20185490

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{157}}^1$

素因数の和:243

約数の個数: 64

約数和(自身を含む): 42045696

約数和(自身を除く): 21860206

約数列:

[1, 2, 5, 10, 13, 23, 26, 43, 46, 65, 86, 115, 130, 157, 215, 230, 299, 314, 430, 559, 598, 785, 989, 1118, 1495, 1570, 1978, 2041, 2795, 2990, 3611, 4082, 4945, 5590, 6751, 7222, 9890, 10205, 12857, 13502, 18055, 20410, 25714, 33755, 36110, 46943, 64285, 67510, 87763, 93886, 128570, 155273, 175526, 234715, 310546, 438815, 469430, 776365, 877630, 1552730, 2018549, 4037098, 10092745, 20185490]

約数ペア:

[(1, 20185490), (2, 10092745), (5, 4037098), (10, 2018549), (13, 1552730), (23, 877630), (26, 776365), (43, 469430), (46, 438815), (65, 310546), (86, 234715), (115, 175526), (130, 155273), (157, 128570), (215, 93886), (230, 87763), (299, 67510), (314, 64285), (430, 46943), (559, 36110), (598, 33755), (785, 25714), (989, 20410), (1118, 18055), (1495, 13502), (1570, 12857), (1978, 10205), (2041, 9890), (2795, 7222), (2990, 6751), (3611, 5590), (4082, 4945)]