20786800

素因数分解:

$2^4\times 5^2\times {\mathrm{157}}^1\times {\mathrm{331}}^1$

素因数の和:506

約数の個数: 60

約数和(自身を含む): 50410216

約数和(自身を除く): 29623416

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 157, 200, 314, 331, 400, 628, 662, 785, 1256, 1324, 1570, 1655, 2512, 2648, 3140, 3310, 3925, 5296, 6280, 6620, 7850, 8275, 12560, 13240, 15700, 16550, 26480, 31400, 33100, 51967, 62800, 66200, 103934, 132400, 207868, 259835, 415736, 519670, 831472, 1039340, 1299175, 2078680, 2598350, 4157360, 5196700, 10393400, 20786800]

約数ペア:

[(1, 20786800), (2, 10393400), (4, 5196700), (5, 4157360), (8, 2598350), (10, 2078680), (16, 1299175), (20, 1039340), (25, 831472), (40, 519670), (50, 415736), (80, 259835), (100, 207868), (157, 132400), (200, 103934), (314, 66200), (331, 62800), (400, 51967), (628, 33100), (662, 31400), (785, 26480), (1256, 16550), (1324, 15700), (1570, 13240), (1655, 12560), (2512, 8275), (2648, 7850), (3140, 6620), (3310, 6280), (3925, 5296)]