20836400

素因数分解:

$2^4\times 5^2\times {\mathrm{13}}^1\times {\mathrm{4007}}^1$

素因数の和:4038

約数の個数: 60

約数和(自身を含む): 53923632

約数和(自身を除く): 33087232

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 40, 50, 52, 65, 80, 100, 104, 130, 200, 208, 260, 325, 400, 520, 650, 1040, 1300, 2600, 4007, 5200, 8014, 16028, 20035, 32056, 40070, 52091, 64112, 80140, 100175, 104182, 160280, 200350, 208364, 260455, 320560, 400700, 416728, 520910, 801400, 833456, 1041820, 1302275, 1602800, 2083640, 2604550, 4167280, 5209100, 10418200, 20836400]

約数ペア:

[(1, 20836400), (2, 10418200), (4, 5209100), (5, 4167280), (8, 2604550), (10, 2083640), (13, 1602800), (16, 1302275), (20, 1041820), (25, 833456), (26, 801400), (40, 520910), (50, 416728), (52, 400700), (65, 320560), (80, 260455), (100, 208364), (104, 200350), (130, 160280), (200, 104182), (208, 100175), (260, 80140), (325, 64112), (400, 52091), (520, 40070), (650, 32056), (1040, 20035), (1300, 16028), (2600, 8014), (4007, 5200)]