21509480

素因数分解:

$2^3\times 5^1\times {\mathrm{163}}^1\times {\mathrm{3299}}^1$

素因数の和:3473

約数の個数: 32

約数和(自身を含む): 48708000

約数和(自身を除く): 27198520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 163, 326, 652, 815, 1304, 1630, 3260, 3299, 6520, 6598, 13196, 16495, 26392, 32990, 65980, 131960, 537737, 1075474, 2150948, 2688685, 4301896, 5377370, 10754740, 21509480]

約数ペア:

[(1, 21509480), (2, 10754740), (4, 5377370), (5, 4301896), (8, 2688685), (10, 2150948), (20, 1075474), (40, 537737), (163, 131960), (326, 65980), (652, 32990), (815, 26392), (1304, 16495), (1630, 13196), (3260, 6598), (3299, 6520)]