20778450

素因数分解:

$2^1\times 3^1\times 5^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{257}}^1$

素因数の和:297

約数の個数: 144

約数和(自身を含む): 65647584

約数和(自身を除く): 44869134

約数列:

[1, 2, 3, 5, 6, 7, 10, 11, 14, 15, 21, 22, 25, 30, 33, 35, 42, 49, 50, 55, 66, 70, 75, 77, 98, 105, 110, 147, 150, 154, 165, 175, 210, 231, 245, 257, 275, 294, 330, 350, 385, 462, 490, 514, 525, 539, 550, 735, 770, 771, 825, 1050, 1078, 1155, 1225, 1285, 1470, 1542, 1617, 1650, 1799, 1925, 2310, 2450, 2570, 2695, 2827, 3234, 3598, 3675, 3850, 3855, 5390, 5397, 5654, 5775, 6425, 7350, 7710, 8085, 8481, 8995, 10794, 11550, 12593, 12850, 13475, 14135, 16170, 16962, 17990, 19275, 19789, 25186, 26950, 26985, 28270, 37779, 38550, 39578, 40425, 42405, 44975, 53970, 59367, 62965, 70675, 75558, 80850, 84810, 89950, 98945, 118734, 125930, 134925, 138523, 141350, 188895, 197890, 212025, 269850, 277046, 296835, 314825, 377790, 415569, 424050, 494725, 593670, 629650, 692615, 831138, 944475, 989450, 1385230, 1484175, 1888950, 2077845, 2968350, 3463075, 4155690, 6926150, 10389225, 20778450]

約数ペア:

[(1, 20778450), (2, 10389225), (3, 6926150), (5, 4155690), (6, 3463075), (7, 2968350), (10, 2077845), (11, 1888950), (14, 1484175), (15, 1385230), (21, 989450), (22, 944475), (25, 831138), (30, 692615), (33, 629650), (35, 593670), (42, 494725), (49, 424050), (50, 415569), (55, 377790), (66, 314825), (70, 296835), (75, 277046), (77, 269850), (98, 212025), (105, 197890), (110, 188895), (147, 141350), (150, 138523), (154, 134925), (165, 125930), (175, 118734), (210, 98945), (231, 89950), (245, 84810), (257, 80850), (275, 75558), (294, 70675), (330, 62965), (350, 59367), (385, 53970), (462, 44975), (490, 42405), (514, 40425), (525, 39578), (539, 38550), (550, 37779), (735, 28270), (770, 26985), (771, 26950), (825, 25186), (1050, 19789), (1078, 19275), (1155, 17990), (1225, 16962), (1285, 16170), (1470, 14135), (1542, 13475), (1617, 12850), (1650, 12593), (1799, 11550), (1925, 10794), (2310, 8995), (2450, 8481), (2570, 8085), (2695, 7710), (2827, 7350), (3234, 6425), (3598, 5775), (3675, 5654), (3850, 5397), (3855, 5390)]