21920940

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{193}}^1\times {\mathrm{631}}^1$

素因数の和:839

約数の個数: 72

約数和(自身を含む): 66943968

約数和(自身を除く): 45023028

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 193, 386, 579, 631, 772, 965, 1158, 1262, 1737, 1893, 1930, 2316, 2524, 2895, 3155, 3474, 3786, 3860, 5679, 5790, 6310, 6948, 7572, 8685, 9465, 11358, 11580, 12620, 17370, 18930, 22716, 28395, 34740, 37860, 56790, 113580, 121783, 243566, 365349, 487132, 608915, 730698, 1096047, 1217830, 1461396, 1826745, 2192094, 2435660, 3653490, 4384188, 5480235, 7306980, 10960470, 21920940]

約数ペア:

[(1, 21920940), (2, 10960470), (3, 7306980), (4, 5480235), (5, 4384188), (6, 3653490), (9, 2435660), (10, 2192094), (12, 1826745), (15, 1461396), (18, 1217830), (20, 1096047), (30, 730698), (36, 608915), (45, 487132), (60, 365349), (90, 243566), (180, 121783), (193, 113580), (386, 56790), (579, 37860), (631, 34740), (772, 28395), (965, 22716), (1158, 18930), (1262, 17370), (1737, 12620), (1893, 11580), (1930, 11358), (2316, 9465), (2524, 8685), (2895, 7572), (3155, 6948), (3474, 6310), (3786, 5790), (3860, 5679)]