21508712420

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{1901}}^1\times {\mathrm{43517}}^1$

素因数の和:45440

約数の個数: 48

約数和(自身を含む): 48669486768

約数和(自身を除く): 27160774348

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 1901, 3802, 7604, 9505, 19010, 24713, 38020, 43517, 49426, 87034, 98852, 123565, 174068, 217585, 247130, 435170, 494260, 565721, 870340, 1131442, 2262884, 2828605, 5657210, 11314420, 82725817, 165451634, 330903268, 413629085, 827258170, 1075435621, 1654516340, 2150871242, 4301742484, 5377178105, 10754356210, 21508712420]

約数ペア:

[(1, 21508712420), (2, 10754356210), (4, 5377178105), (5, 4301742484), (10, 2150871242), (13, 1654516340), (20, 1075435621), (26, 827258170), (52, 413629085), (65, 330903268), (130, 165451634), (260, 82725817), (1901, 11314420), (3802, 5657210), (7604, 2828605), (9505, 2262884), (19010, 1131442), (24713, 870340), (38020, 565721), (43517, 494260), (49426, 435170), (87034, 247130), (98852, 217585), (123565, 174068)]