638973985

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{331}}^1\times {\mathrm{1747}}^1$

素因数の和:2113

約数の個数: 32

約数和(自身を含む): 877468032

約数和(自身を除く): 238494047

約数列:

[1, 5, 13, 17, 65, 85, 221, 331, 1105, 1655, 1747, 4303, 5627, 8735, 21515, 22711, 28135, 29699, 73151, 113555, 148495, 365755, 386087, 578257, 1930435, 2891285, 7517341, 9830369, 37586705, 49151845, 127794797, 638973985]

約数ペア:

[(1, 638973985), (5, 127794797), (13, 49151845), (17, 37586705), (65, 9830369), (85, 7517341), (221, 2891285), (331, 1930435), (1105, 578257), (1655, 386087), (1747, 365755), (4303, 148495), (5627, 113555), (8735, 73151), (21515, 29699), (22711, 28135)]