21261500

素因数分解:

$2^2\times 5^3\times {\mathrm{13}}^1\times {\mathrm{3271}}^1$

素因数の和:3303

約数の個数: 48

約数和(自身を含む): 50022336

約数和(自身を除く): 28760836

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 125, 130, 250, 260, 325, 500, 650, 1300, 1625, 3250, 3271, 6500, 6542, 13084, 16355, 32710, 42523, 65420, 81775, 85046, 163550, 170092, 212615, 327100, 408875, 425230, 817750, 850460, 1063075, 1635500, 2126150, 4252300, 5315375, 10630750, 21261500]

約数ペア:

[(1, 21261500), (2, 10630750), (4, 5315375), (5, 4252300), (10, 2126150), (13, 1635500), (20, 1063075), (25, 850460), (26, 817750), (50, 425230), (52, 408875), (65, 327100), (100, 212615), (125, 170092), (130, 163550), (250, 85046), (260, 81775), (325, 65420), (500, 42523), (650, 32710), (1300, 16355), (1625, 13084), (3250, 6542), (3271, 6500)]