20179640

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{151}}^1\times {\mathrm{257}}^1$

素因数の和:432

約数の個数: 64

約数和(自身を含む): 49412160

約数和(自身を除く): 29232520

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 151, 257, 260, 302, 514, 520, 604, 755, 1028, 1208, 1285, 1510, 1963, 2056, 2570, 3020, 3341, 3926, 5140, 6040, 6682, 7852, 9815, 10280, 13364, 15704, 16705, 19630, 26728, 33410, 38807, 39260, 66820, 77614, 78520, 133640, 155228, 194035, 310456, 388070, 504491, 776140, 1008982, 1552280, 2017964, 2522455, 4035928, 5044910, 10089820, 20179640]

約数ペア:

[(1, 20179640), (2, 10089820), (4, 5044910), (5, 4035928), (8, 2522455), (10, 2017964), (13, 1552280), (20, 1008982), (26, 776140), (40, 504491), (52, 388070), (65, 310456), (104, 194035), (130, 155228), (151, 133640), (257, 78520), (260, 77614), (302, 66820), (514, 39260), (520, 38807), (604, 33410), (755, 26728), (1028, 19630), (1208, 16705), (1285, 15704), (1510, 13364), (1963, 10280), (2056, 9815), (2570, 7852), (3020, 6682), (3341, 6040), (3926, 5140)]