21128480

素因数分解:

$2^5\times 5^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{83}}^1$

素因数の和:178

約数の個数: 96

約数和(自身を含む): 53089344

約数和(自身を除く): 31960864

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 37, 40, 43, 74, 80, 83, 86, 148, 160, 166, 172, 185, 215, 296, 332, 344, 370, 415, 430, 592, 664, 688, 740, 830, 860, 1184, 1328, 1376, 1480, 1591, 1660, 1720, 2656, 2960, 3071, 3182, 3320, 3440, 3569, 5920, 6142, 6364, 6640, 6880, 7138, 7955, 12284, 12728, 13280, 14276, 15355, 15910, 17845, 24568, 25456, 28552, 30710, 31820, 35690, 49136, 50912, 57104, 61420, 63640, 71380, 98272, 114208, 122840, 127280, 132053, 142760, 245680, 254560, 264106, 285520, 491360, 528212, 571040, 660265, 1056424, 1320530, 2112848, 2641060, 4225696, 5282120, 10564240, 21128480]

約数ペア:

[(1, 21128480), (2, 10564240), (4, 5282120), (5, 4225696), (8, 2641060), (10, 2112848), (16, 1320530), (20, 1056424), (32, 660265), (37, 571040), (40, 528212), (43, 491360), (74, 285520), (80, 264106), (83, 254560), (86, 245680), (148, 142760), (160, 132053), (166, 127280), (172, 122840), (185, 114208), (215, 98272), (296, 71380), (332, 63640), (344, 61420), (370, 57104), (415, 50912), (430, 49136), (592, 35690), (664, 31820), (688, 30710), (740, 28552), (830, 25456), (860, 24568), (1184, 17845), (1328, 15910), (1376, 15355), (1480, 14276), (1591, 13280), (1660, 12728), (1720, 12284), (2656, 7955), (2960, 7138), (3071, 6880), (3182, 6640), (3320, 6364), (3440, 6142), (3569, 5920)]