21521370

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{397}}^1$

素因数の和:559

約数の個数: 64

約数和(自身を含む): 56165760

約数和(自身を除く): 34644390

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 139, 195, 278, 390, 397, 417, 695, 794, 834, 1191, 1390, 1807, 1985, 2085, 2382, 3614, 3970, 4170, 5161, 5421, 5955, 9035, 10322, 10842, 11910, 15483, 18070, 25805, 27105, 30966, 51610, 54210, 55183, 77415, 110366, 154830, 165549, 275915, 331098, 551830, 717379, 827745, 1434758, 1655490, 2152137, 3586895, 4304274, 7173790, 10760685, 21521370]

約数ペア:

[(1, 21521370), (2, 10760685), (3, 7173790), (5, 4304274), (6, 3586895), (10, 2152137), (13, 1655490), (15, 1434758), (26, 827745), (30, 717379), (39, 551830), (65, 331098), (78, 275915), (130, 165549), (139, 154830), (195, 110366), (278, 77415), (390, 55183), (397, 54210), (417, 51610), (695, 30966), (794, 27105), (834, 25805), (1191, 18070), (1390, 15483), (1807, 11910), (1985, 10842), (2085, 10322), (2382, 9035), (3614, 5955), (3970, 5421), (4170, 5161)]