20123123755

素因数分解:

$5^1\times 7^2\times {\mathrm{137}}^1\times {\mathrm{661}}^1\times {\mathrm{907}}^1$

素因数の和:1724

約数の個数: 48

約数和(自身を含む): 28369326816

約数和(自身を除く): 8246203061

約数列:

[1, 5, 7, 35, 49, 137, 245, 661, 685, 907, 959, 3305, 4535, 4627, 4795, 6349, 6713, 23135, 31745, 32389, 33565, 44443, 90557, 124259, 161945, 222215, 452785, 599527, 621295, 633899, 869813, 2997635, 3169495, 4196689, 4349065, 4437293, 6088691, 20983445, 22186465, 29376823, 30443455, 82135199, 146884115, 410675995, 574946393, 2874731965, 4024624751, 20123123755]

約数ペア:

[(1, 20123123755), (5, 4024624751), (7, 2874731965), (35, 574946393), (49, 410675995), (137, 146884115), (245, 82135199), (661, 30443455), (685, 29376823), (907, 22186465), (959, 20983445), (3305, 6088691), (4535, 4437293), (4627, 4349065), (4795, 4196689), (6349, 3169495), (6713, 2997635), (23135, 869813), (31745, 633899), (32389, 621295), (33565, 599527), (44443, 452785), (90557, 222215), (124259, 161945)]