28282280

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{397}}^1$

素因数の和:558

約数の個数: 64

約数和(自身を含む): 69204240

約数和(自身を除く): 40921960

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 137, 260, 274, 397, 520, 548, 685, 794, 1096, 1370, 1588, 1781, 1985, 2740, 3176, 3562, 3970, 5161, 5480, 7124, 7940, 8905, 10322, 14248, 15880, 17810, 20644, 25805, 35620, 41288, 51610, 54389, 71240, 103220, 108778, 206440, 217556, 271945, 435112, 543890, 707057, 1087780, 1414114, 2175560, 2828228, 3535285, 5656456, 7070570, 14141140, 28282280]

約数ペア:

[(1, 28282280), (2, 14141140), (4, 7070570), (5, 5656456), (8, 3535285), (10, 2828228), (13, 2175560), (20, 1414114), (26, 1087780), (40, 707057), (52, 543890), (65, 435112), (104, 271945), (130, 217556), (137, 206440), (260, 108778), (274, 103220), (397, 71240), (520, 54389), (548, 51610), (685, 41288), (794, 35620), (1096, 25805), (1370, 20644), (1588, 17810), (1781, 15880), (1985, 14248), (2740, 10322), (3176, 8905), (3562, 7940), (3970, 7124), (5161, 5480)]