21211710

素因数分解:

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

素因数の和:557

約数の個数: 64

約数和(自身を含む): 55363392

約数和(自身を除く): 34151682

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 137, 195, 274, 390, 397, 411, 685, 794, 822, 1191, 1370, 1781, 1985, 2055, 2382, 3562, 3970, 4110, 5161, 5343, 5955, 8905, 10322, 10686, 11910, 15483, 17810, 25805, 26715, 30966, 51610, 53430, 54389, 77415, 108778, 154830, 163167, 271945, 326334, 543890, 707057, 815835, 1414114, 1631670, 2121171, 3535285, 4242342, 7070570, 10605855, 21211710]

約数ペア:

[(1, 21211710), (2, 10605855), (3, 7070570), (5, 4242342), (6, 3535285), (10, 2121171), (13, 1631670), (15, 1414114), (26, 815835), (30, 707057), (39, 543890), (65, 326334), (78, 271945), (130, 163167), (137, 154830), (195, 108778), (274, 77415), (390, 54389), (397, 53430), (411, 51610), (685, 30966), (794, 26715), (822, 25805), (1191, 17810), (1370, 15483), (1781, 11910), (1985, 10686), (2055, 10322), (2382, 8905), (3562, 5955), (3970, 5343), (4110, 5161)]