21671818

素因数分解:

$2^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{113}}^1$

素因数の和:251

約数の個数: 48

約数和(自身を含む): 40547520

約数和(自身を除く): 18875702

約数列:

[1, 2, 7, 14, 19, 38, 49, 98, 103, 113, 133, 206, 226, 266, 721, 791, 931, 1442, 1582, 1862, 1957, 2147, 3914, 4294, 5047, 5537, 10094, 11074, 11639, 13699, 15029, 23278, 27398, 30058, 81473, 95893, 105203, 162946, 191786, 210406, 221141, 442282, 570311, 1140622, 1547987, 3095974, 10835909, 21671818]

約数ペア:

[(1, 21671818), (2, 10835909), (7, 3095974), (14, 1547987), (19, 1140622), (38, 570311), (49, 442282), (98, 221141), (103, 210406), (113, 191786), (133, 162946), (206, 105203), (226, 95893), (266, 81473), (721, 30058), (791, 27398), (931, 23278), (1442, 15029), (1582, 13699), (1862, 11639), (1957, 11074), (2147, 10094), (3914, 5537), (4294, 5047)]