20984830

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{139}}^1\times {\mathrm{487}}^1$

素因数の和:664

約数の個数: 32

約数和(自身を含む): 39352320

約数和(自身を除く): 18367490

約数列:

[1, 2, 5, 10, 31, 62, 139, 155, 278, 310, 487, 695, 974, 1390, 2435, 4309, 4870, 8618, 15097, 21545, 30194, 43090, 67693, 75485, 135386, 150970, 338465, 676930, 2098483, 4196966, 10492415, 20984830]

約数ペア:

[(1, 20984830), (2, 10492415), (5, 4196966), (10, 2098483), (31, 676930), (62, 338465), (139, 150970), (155, 135386), (278, 75485), (310, 67693), (487, 43090), (695, 30194), (974, 21545), (1390, 15097), (2435, 8618), (4309, 4870)]