21621260

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{811}}^1$

素因数の和:894

約数の個数: 48

約数和(自身を含む): 48018432

約数和(自身を除く): 26397172

約数列:

[1, 2, 4, 5, 10, 20, 31, 43, 62, 86, 124, 155, 172, 215, 310, 430, 620, 811, 860, 1333, 1622, 2666, 3244, 4055, 5332, 6665, 8110, 13330, 16220, 25141, 26660, 34873, 50282, 69746, 100564, 125705, 139492, 174365, 251410, 348730, 502820, 697460, 1081063, 2162126, 4324252, 5405315, 10810630, 21621260]

約数ペア:

[(1, 21621260), (2, 10810630), (4, 5405315), (5, 4324252), (10, 2162126), (20, 1081063), (31, 697460), (43, 502820), (62, 348730), (86, 251410), (124, 174365), (155, 139492), (172, 125705), (215, 100564), (310, 69746), (430, 50282), (620, 34873), (811, 26660), (860, 25141), (1333, 16220), (1622, 13330), (2666, 8110), (3244, 6665), (4055, 5332)]