21979390

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{3989}}^1$

素因数の和:4044

約数の個数: 32

約数和(自身を含む): 43092000

約数和(自身を除く): 21112610

約数列:

[1, 2, 5, 10, 19, 29, 38, 58, 95, 145, 190, 290, 551, 1102, 2755, 3989, 5510, 7978, 19945, 39890, 75791, 115681, 151582, 231362, 378955, 578405, 757910, 1156810, 2197939, 4395878, 10989695, 21979390]

約数ペア:

[(1, 21979390), (2, 10989695), (5, 4395878), (10, 2197939), (19, 1156810), (29, 757910), (38, 578405), (58, 378955), (95, 231362), (145, 151582), (190, 115681), (290, 75791), (551, 39890), (1102, 19945), (2755, 7978), (3989, 5510)]