21684520

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{223}}^1$

素因数の和:275

約数の個数: 128

約数和(自身を含む): 60963840

約数和(自身を除く): 39279320

約数列:

[1, 2, 4, 5, 8, 10, 11, 13, 17, 20, 22, 26, 34, 40, 44, 52, 55, 65, 68, 85, 88, 104, 110, 130, 136, 143, 170, 187, 220, 221, 223, 260, 286, 340, 374, 440, 442, 446, 520, 572, 680, 715, 748, 884, 892, 935, 1105, 1115, 1144, 1430, 1496, 1768, 1784, 1870, 2210, 2230, 2431, 2453, 2860, 2899, 3740, 3791, 4420, 4460, 4862, 4906, 5720, 5798, 7480, 7582, 8840, 8920, 9724, 9812, 11596, 12155, 12265, 14495, 15164, 18955, 19448, 19624, 23192, 24310, 24530, 28990, 30328, 31889, 37910, 41701, 48620, 49060, 49283, 57980, 63778, 75820, 83402, 97240, 98120, 98566, 115960, 127556, 151640, 159445, 166804, 197132, 208505, 246415, 255112, 318890, 333608, 394264, 417010, 492830, 542113, 637780, 834020, 985660, 1084226, 1275560, 1668040, 1971320, 2168452, 2710565, 4336904, 5421130, 10842260, 21684520]

約数ペア:

[(1, 21684520), (2, 10842260), (4, 5421130), (5, 4336904), (8, 2710565), (10, 2168452), (11, 1971320), (13, 1668040), (17, 1275560), (20, 1084226), (22, 985660), (26, 834020), (34, 637780), (40, 542113), (44, 492830), (52, 417010), (55, 394264), (65, 333608), (68, 318890), (85, 255112), (88, 246415), (104, 208505), (110, 197132), (130, 166804), (136, 159445), (143, 151640), (170, 127556), (187, 115960), (220, 98566), (221, 98120), (223, 97240), (260, 83402), (286, 75820), (340, 63778), (374, 57980), (440, 49283), (442, 49060), (446, 48620), (520, 41701), (572, 37910), (680, 31889), (715, 30328), (748, 28990), (884, 24530), (892, 24310), (935, 23192), (1105, 19624), (1115, 19448), (1144, 18955), (1430, 15164), (1496, 14495), (1768, 12265), (1784, 12155), (1870, 11596), (2210, 9812), (2230, 9724), (2431, 8920), (2453, 8840), (2860, 7582), (2899, 7480), (3740, 5798), (3791, 5720), (4420, 4906), (4460, 4862)]