21298400

素因数分解:

$2^5\times 5^2\times {\mathrm{79}}^1\times {\mathrm{337}}^1$

素因数の和:436

約数の個数: 72

約数和(自身を含む): 52809120

約数和(自身を除く): 31510720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 79, 80, 100, 158, 160, 200, 316, 337, 395, 400, 632, 674, 790, 800, 1264, 1348, 1580, 1685, 1975, 2528, 2696, 3160, 3370, 3950, 5392, 6320, 6740, 7900, 8425, 10784, 12640, 13480, 15800, 16850, 26623, 26960, 31600, 33700, 53246, 53920, 63200, 67400, 106492, 133115, 134800, 212984, 266230, 269600, 425968, 532460, 665575, 851936, 1064920, 1331150, 2129840, 2662300, 4259680, 5324600, 10649200, 21298400]

約数ペア:

[(1, 21298400), (2, 10649200), (4, 5324600), (5, 4259680), (8, 2662300), (10, 2129840), (16, 1331150), (20, 1064920), (25, 851936), (32, 665575), (40, 532460), (50, 425968), (79, 269600), (80, 266230), (100, 212984), (158, 134800), (160, 133115), (200, 106492), (316, 67400), (337, 63200), (395, 53920), (400, 53246), (632, 33700), (674, 31600), (790, 26960), (800, 26623), (1264, 16850), (1348, 15800), (1580, 13480), (1685, 12640), (1975, 10784), (2528, 8425), (2696, 7900), (3160, 6740), (3370, 6320), (3950, 5392)]