81604120

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{1129}}^1$

素因数の和:1292

約数の個数: 64

約数和(自身を含む): 199332000

約数和(自身を除く): 117727880

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 139, 260, 278, 520, 556, 695, 1112, 1129, 1390, 1807, 2258, 2780, 3614, 4516, 5560, 5645, 7228, 9032, 9035, 11290, 14456, 14677, 18070, 22580, 29354, 36140, 45160, 58708, 72280, 73385, 117416, 146770, 156931, 293540, 313862, 587080, 627724, 784655, 1255448, 1569310, 2040103, 3138620, 4080206, 6277240, 8160412, 10200515, 16320824, 20401030, 40802060, 81604120]

約数ペア:

[(1, 81604120), (2, 40802060), (4, 20401030), (5, 16320824), (8, 10200515), (10, 8160412), (13, 6277240), (20, 4080206), (26, 3138620), (40, 2040103), (52, 1569310), (65, 1255448), (104, 784655), (130, 627724), (139, 587080), (260, 313862), (278, 293540), (520, 156931), (556, 146770), (695, 117416), (1112, 73385), (1129, 72280), (1390, 58708), (1807, 45160), (2258, 36140), (2780, 29354), (3614, 22580), (4516, 18070), (5560, 14677), (5645, 14456), (7228, 11290), (9032, 9035)]