21821540

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{4937}}^1$

素因数の和:4976

約数の個数: 48

約数和(自身を含む): 52263792

約数和(自身を除く): 30442252

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 26, 34, 52, 65, 68, 85, 130, 170, 221, 260, 340, 442, 884, 1105, 2210, 4420, 4937, 9874, 19748, 24685, 49370, 64181, 83929, 98740, 128362, 167858, 256724, 320905, 335716, 419645, 641810, 839290, 1091077, 1283620, 1678580, 2182154, 4364308, 5455385, 10910770, 21821540]

約数ペア:

[(1, 21821540), (2, 10910770), (4, 5455385), (5, 4364308), (10, 2182154), (13, 1678580), (17, 1283620), (20, 1091077), (26, 839290), (34, 641810), (52, 419645), (65, 335716), (68, 320905), (85, 256724), (130, 167858), (170, 128362), (221, 98740), (260, 83929), (340, 64181), (442, 49370), (884, 24685), (1105, 19748), (2210, 9874), (4420, 4937)]