21001620

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{541}}^1\times {\mathrm{647}}^1$

素因数の和:1200

約数の個数: 48

約数和(自身を含む): 59004288

約数和(自身を除く): 38002668

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 541, 647, 1082, 1294, 1623, 1941, 2164, 2588, 2705, 3235, 3246, 3882, 5410, 6470, 6492, 7764, 8115, 9705, 10820, 12940, 16230, 19410, 32460, 38820, 350027, 700054, 1050081, 1400108, 1750135, 2100162, 3500270, 4200324, 5250405, 7000540, 10500810, 21001620]

約数ペア:

[(1, 21001620), (2, 10500810), (3, 7000540), (4, 5250405), (5, 4200324), (6, 3500270), (10, 2100162), (12, 1750135), (15, 1400108), (20, 1050081), (30, 700054), (60, 350027), (541, 38820), (647, 32460), (1082, 19410), (1294, 16230), (1623, 12940), (1941, 10820), (2164, 9705), (2588, 8115), (2705, 7764), (3235, 6492), (3246, 6470), (3882, 5410)]