21805390

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{4423}}^1$

素因数の和:4476

約数の個数: 32

約数和(自身を含む): 43001280

約数和(自身を除く): 21195890

約数列:

[1, 2, 5, 10, 17, 29, 34, 58, 85, 145, 170, 290, 493, 986, 2465, 4423, 4930, 8846, 22115, 44230, 75191, 128267, 150382, 256534, 375955, 641335, 751910, 1282670, 2180539, 4361078, 10902695, 21805390]

約数ペア:

[(1, 21805390), (2, 10902695), (5, 4361078), (10, 2180539), (17, 1282670), (29, 751910), (34, 641335), (58, 375955), (85, 256534), (145, 150382), (170, 128267), (290, 75191), (493, 44230), (986, 22115), (2465, 8846), (4423, 4930)]