20842960

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1\times {\mathrm{83}}^1$

素因数の和:212

約数の個数: 80

約数和(自身を含む): 50871744

約数和(自身を除く): 30028784

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 73, 80, 83, 86, 146, 166, 172, 215, 292, 332, 344, 365, 415, 430, 584, 664, 688, 730, 830, 860, 1168, 1328, 1460, 1660, 1720, 2920, 3139, 3320, 3440, 3569, 5840, 6059, 6278, 6640, 7138, 12118, 12556, 14276, 15695, 17845, 24236, 25112, 28552, 30295, 31390, 35690, 48472, 50224, 57104, 60590, 62780, 71380, 96944, 121180, 125560, 142760, 242360, 251120, 260537, 285520, 484720, 521074, 1042148, 1302685, 2084296, 2605370, 4168592, 5210740, 10421480, 20842960]

約数ペア:

[(1, 20842960), (2, 10421480), (4, 5210740), (5, 4168592), (8, 2605370), (10, 2084296), (16, 1302685), (20, 1042148), (40, 521074), (43, 484720), (73, 285520), (80, 260537), (83, 251120), (86, 242360), (146, 142760), (166, 125560), (172, 121180), (215, 96944), (292, 71380), (332, 62780), (344, 60590), (365, 57104), (415, 50224), (430, 48472), (584, 35690), (664, 31390), (688, 30295), (730, 28552), (830, 25112), (860, 24236), (1168, 17845), (1328, 15695), (1460, 14276), (1660, 12556), (1720, 12118), (2920, 7138), (3139, 6640), (3320, 6278), (3440, 6059), (3569, 5840)]