21293720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{113}}^1\times {\mathrm{673}}^1$

素因数の和:804

約数の個数: 64

約数和(自身を含む): 55321920

約数和(自身を除く): 34028200

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 113, 140, 226, 280, 452, 565, 673, 791, 904, 1130, 1346, 1582, 2260, 2692, 3164, 3365, 3955, 4520, 4711, 5384, 6328, 6730, 7910, 9422, 13460, 15820, 18844, 23555, 26920, 31640, 37688, 47110, 76049, 94220, 152098, 188440, 304196, 380245, 532343, 608392, 760490, 1064686, 1520980, 2129372, 2661715, 3041960, 4258744, 5323430, 10646860, 21293720]

約数ペア:

[(1, 21293720), (2, 10646860), (4, 5323430), (5, 4258744), (7, 3041960), (8, 2661715), (10, 2129372), (14, 1520980), (20, 1064686), (28, 760490), (35, 608392), (40, 532343), (56, 380245), (70, 304196), (113, 188440), (140, 152098), (226, 94220), (280, 76049), (452, 47110), (565, 37688), (673, 31640), (791, 26920), (904, 23555), (1130, 18844), (1346, 15820), (1582, 13460), (2260, 9422), (2692, 7910), (3164, 6730), (3365, 6328), (3955, 5384), (4520, 4711)]