18801250

素因数分解:

$2^1\times 5^4\times {\mathrm{13}}^2\times {\mathrm{89}}^1$

素因数の和:137

約数の個数: 60

約数和(自身を含む): 38589210

約数和(自身を除く): 19787960

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 89, 125, 130, 169, 178, 250, 325, 338, 445, 625, 650, 845, 890, 1157, 1250, 1625, 1690, 2225, 2314, 3250, 4225, 4450, 5785, 8125, 8450, 11125, 11570, 15041, 16250, 21125, 22250, 28925, 30082, 42250, 55625, 57850, 75205, 105625, 111250, 144625, 150410, 211250, 289250, 376025, 723125, 752050, 1446250, 1880125, 3760250, 9400625, 18801250]

約数ペア:

[(1, 18801250), (2, 9400625), (5, 3760250), (10, 1880125), (13, 1446250), (25, 752050), (26, 723125), (50, 376025), (65, 289250), (89, 211250), (125, 150410), (130, 144625), (169, 111250), (178, 105625), (250, 75205), (325, 57850), (338, 55625), (445, 42250), (625, 30082), (650, 28925), (845, 22250), (890, 21125), (1157, 16250), (1250, 15041), (1625, 11570), (1690, 11125), (2225, 8450), (2314, 8125), (3250, 5785), (4225, 4450)]