21581200

素因数分解:

$2^4\times 5^2\times {\mathrm{163}}^1\times {\mathrm{331}}^1$

素因数の和:512

約数の個数: 60

約数和(自身を含む): 52324528

約数和(自身を除く): 30743328

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 163, 200, 326, 331, 400, 652, 662, 815, 1304, 1324, 1630, 1655, 2608, 2648, 3260, 3310, 4075, 5296, 6520, 6620, 8150, 8275, 13040, 13240, 16300, 16550, 26480, 32600, 33100, 53953, 65200, 66200, 107906, 132400, 215812, 269765, 431624, 539530, 863248, 1079060, 1348825, 2158120, 2697650, 4316240, 5395300, 10790600, 21581200]

約数ペア:

[(1, 21581200), (2, 10790600), (4, 5395300), (5, 4316240), (8, 2697650), (10, 2158120), (16, 1348825), (20, 1079060), (25, 863248), (40, 539530), (50, 431624), (80, 269765), (100, 215812), (163, 132400), (200, 107906), (326, 66200), (331, 65200), (400, 53953), (652, 33100), (662, 32600), (815, 26480), (1304, 16550), (1324, 16300), (1630, 13240), (1655, 13040), (2608, 8275), (2648, 8150), (3260, 6620), (3310, 6520), (4075, 5296)]