21000953740

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{269}}^1\times {\mathrm{1039}}^1$

素因数の和:1364

約数の個数: 144

約数和(自身を含む): 50688892800

約数和(自身を除く): 29687939060

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 26, 34, 52, 65, 68, 85, 130, 170, 221, 260, 269, 289, 340, 442, 538, 578, 884, 1039, 1076, 1105, 1156, 1345, 1445, 2078, 2210, 2690, 2890, 3497, 3757, 4156, 4420, 4573, 5195, 5380, 5780, 6994, 7514, 9146, 10390, 13507, 13988, 15028, 17485, 17663, 18292, 18785, 20780, 22865, 27014, 34970, 35326, 37570, 45730, 54028, 59449, 67535, 69940, 70652, 75140, 77741, 88315, 91460, 118898, 135070, 155482, 176630, 229619, 237796, 270140, 279491, 297245, 300271, 310964, 353260, 388705, 459238, 558982, 594490, 600542, 777410, 918476, 1010633, 1117964, 1148095, 1188980, 1201084, 1397455, 1501355, 1554820, 2021266, 2296190, 2794910, 3002710, 3633383, 3903523, 4042532, 4592380, 4751347, 5053165, 5589820, 6005420, 7266766, 7807046, 9502694, 10106330, 14533532, 15614092, 18166915, 19005388, 19517615, 20212660, 23756735, 36333830, 39035230, 47513470, 61767511, 72667660, 78070460, 80772899, 95026940, 123535022, 161545798, 247070044, 308837555, 323091596, 403864495, 617675110, 807728990, 1050047687, 1235350220, 1615457980, 2100095374, 4200190748, 5250238435, 10500476870, 21000953740]

約数ペア:

[(1, 21000953740), (2, 10500476870), (4, 5250238435), (5, 4200190748), (10, 2100095374), (13, 1615457980), (17, 1235350220), (20, 1050047687), (26, 807728990), (34, 617675110), (52, 403864495), (65, 323091596), (68, 308837555), (85, 247070044), (130, 161545798), (170, 123535022), (221, 95026940), (260, 80772899), (269, 78070460), (289, 72667660), (340, 61767511), (442, 47513470), (538, 39035230), (578, 36333830), (884, 23756735), (1039, 20212660), (1076, 19517615), (1105, 19005388), (1156, 18166915), (1345, 15614092), (1445, 14533532), (2078, 10106330), (2210, 9502694), (2690, 7807046), (2890, 7266766), (3497, 6005420), (3757, 5589820), (4156, 5053165), (4420, 4751347), (4573, 4592380), (5195, 4042532), (5380, 3903523), (5780, 3633383), (6994, 3002710), (7514, 2794910), (9146, 2296190), (10390, 2021266), (13507, 1554820), (13988, 1501355), (15028, 1397455), (17485, 1201084), (17663, 1188980), (18292, 1148095), (18785, 1117964), (20780, 1010633), (22865, 918476), (27014, 777410), (34970, 600542), (35326, 594490), (37570, 558982), (45730, 459238), (54028, 388705), (59449, 353260), (67535, 310964), (69940, 300271), (70652, 297245), (75140, 279491), (77741, 270140), (88315, 237796), (91460, 229619), (118898, 176630), (135070, 155482)]