20455970

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{151}}^1$

素因数の和:231

約数の個数: 64

約数和(自身を含む): 42024960

約数和(自身を除く): 21568990

約数列:

[1, 2, 5, 10, 19, 23, 31, 38, 46, 62, 95, 115, 151, 155, 190, 230, 302, 310, 437, 589, 713, 755, 874, 1178, 1426, 1510, 2185, 2869, 2945, 3473, 3565, 4370, 4681, 5738, 5890, 6946, 7130, 9362, 13547, 14345, 17365, 23405, 27094, 28690, 34730, 46810, 65987, 67735, 88939, 107663, 131974, 135470, 177878, 215326, 329935, 444695, 538315, 659870, 889390, 1076630, 2045597, 4091194, 10227985, 20455970]

約数ペア:

[(1, 20455970), (2, 10227985), (5, 4091194), (10, 2045597), (19, 1076630), (23, 889390), (31, 659870), (38, 538315), (46, 444695), (62, 329935), (95, 215326), (115, 177878), (151, 135470), (155, 131974), (190, 107663), (230, 88939), (302, 67735), (310, 65987), (437, 46810), (589, 34730), (713, 28690), (755, 27094), (874, 23405), (1178, 17365), (1426, 14345), (1510, 13547), (2185, 9362), (2869, 7130), (2945, 6946), (3473, 5890), (3565, 5738), (4370, 4681)]