21279818

素因数分解:

$2^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{241}}^1$

素因数の和:327

約数の個数: 48

約数和(自身を含む): 40223304

約数和(自身を除く): 18943486

約数列:

[1, 2, 7, 14, 17, 34, 49, 53, 98, 106, 119, 238, 241, 371, 482, 742, 833, 901, 1666, 1687, 1802, 2597, 3374, 4097, 5194, 6307, 8194, 11809, 12614, 12773, 23618, 25546, 28679, 44149, 57358, 88298, 89411, 178822, 200753, 217141, 401506, 434282, 625877, 1251754, 1519987, 3039974, 10639909, 21279818]

約数ペア:

[(1, 21279818), (2, 10639909), (7, 3039974), (14, 1519987), (17, 1251754), (34, 625877), (49, 434282), (53, 401506), (98, 217141), (106, 200753), (119, 178822), (238, 89411), (241, 88298), (371, 57358), (482, 44149), (742, 28679), (833, 25546), (901, 23618), (1666, 12773), (1687, 12614), (1802, 11809), (2597, 8194), (3374, 6307), (4097, 5194)]