31138780

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{139}}^1\times {\mathrm{487}}^1$

素因数の和:658

約数の個数: 48

約数和(自身を含む): 68866560

約数和(自身を除く): 37727780

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 92, 115, 139, 230, 278, 460, 487, 556, 695, 974, 1390, 1948, 2435, 2780, 3197, 4870, 6394, 9740, 11201, 12788, 15985, 22402, 31970, 44804, 56005, 63940, 67693, 112010, 135386, 224020, 270772, 338465, 676930, 1353860, 1556939, 3113878, 6227756, 7784695, 15569390, 31138780]

約数ペア:

[(1, 31138780), (2, 15569390), (4, 7784695), (5, 6227756), (10, 3113878), (20, 1556939), (23, 1353860), (46, 676930), (92, 338465), (115, 270772), (139, 224020), (230, 135386), (278, 112010), (460, 67693), (487, 63940), (556, 56005), (695, 44804), (974, 31970), (1390, 22402), (1948, 15985), (2435, 12788), (2780, 11201), (3197, 9740), (4870, 6394)]