21457644

素因数分解:

$2^2\times 3^1\times {\mathrm{13}}^1\times {\mathrm{263}}^1\times {\mathrm{523}}^1$

素因数の和:806

約数の個数: 48

約数和(自身を含む): 54227712

約数和(自身を除く): 32770068

約数列:

[1, 2, 3, 4, 6, 12, 13, 26, 39, 52, 78, 156, 263, 523, 526, 789, 1046, 1052, 1569, 1578, 2092, 3138, 3156, 3419, 6276, 6799, 6838, 10257, 13598, 13676, 20397, 20514, 27196, 40794, 41028, 81588, 137549, 275098, 412647, 550196, 825294, 1650588, 1788137, 3576274, 5364411, 7152548, 10728822, 21457644]

約数ペア:

[(1, 21457644), (2, 10728822), (3, 7152548), (4, 5364411), (6, 3576274), (12, 1788137), (13, 1650588), (26, 825294), (39, 550196), (52, 412647), (78, 275098), (156, 137549), (263, 81588), (523, 41028), (526, 40794), (789, 27196), (1046, 20514), (1052, 20397), (1569, 13676), (1578, 13598), (2092, 10257), (3138, 6838), (3156, 6799), (3419, 6276)]