21057100

素因数分解:

$2^2\times 5^2\times {\mathrm{43}}^1\times {\mathrm{59}}^1\times {\mathrm{83}}^1$

素因数の和:199

約数の個数: 72

約数和(自身を含む): 48121920

約数和(自身を除く): 27064820

約数列:

[1, 2, 4, 5, 10, 20, 25, 43, 50, 59, 83, 86, 100, 118, 166, 172, 215, 236, 295, 332, 415, 430, 590, 830, 860, 1075, 1180, 1475, 1660, 2075, 2150, 2537, 2950, 3569, 4150, 4300, 4897, 5074, 5900, 7138, 8300, 9794, 10148, 12685, 14276, 17845, 19588, 24485, 25370, 35690, 48970, 50740, 63425, 71380, 89225, 97940, 122425, 126850, 178450, 210571, 244850, 253700, 356900, 421142, 489700, 842284, 1052855, 2105710, 4211420, 5264275, 10528550, 21057100]

約数ペア:

[(1, 21057100), (2, 10528550), (4, 5264275), (5, 4211420), (10, 2105710), (20, 1052855), (25, 842284), (43, 489700), (50, 421142), (59, 356900), (83, 253700), (86, 244850), (100, 210571), (118, 178450), (166, 126850), (172, 122425), (215, 97940), (236, 89225), (295, 71380), (332, 63425), (415, 50740), (430, 48970), (590, 35690), (830, 25370), (860, 24485), (1075, 19588), (1180, 17845), (1475, 14276), (1660, 12685), (2075, 10148), (2150, 9794), (2537, 8300), (2950, 7138), (3569, 5900), (4150, 5074), (4300, 4897)]