21519790

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{103}}^1\times {\mathrm{1229}}^1$

素因数の和:1356

約数の個数: 32

約数和(自身を含む): 41446080

約数和(自身を除く): 19926290

約数列:

[1, 2, 5, 10, 17, 34, 85, 103, 170, 206, 515, 1030, 1229, 1751, 2458, 3502, 6145, 8755, 12290, 17510, 20893, 41786, 104465, 126587, 208930, 253174, 632935, 1265870, 2151979, 4303958, 10759895, 21519790]

約数ペア:

[(1, 21519790), (2, 10759895), (5, 4303958), (10, 2151979), (17, 1265870), (34, 632935), (85, 253174), (103, 208930), (170, 126587), (206, 104465), (515, 41786), (1030, 20893), (1229, 17510), (1751, 12290), (2458, 8755), (3502, 6145)]