21465212

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{73}}^2$

素因数の和:222

約数の個数: 36

約数和(自身を含む): 40846680

約数和(自身を除く): 19381468

約数列:

[1, 2, 4, 19, 38, 53, 73, 76, 106, 146, 212, 292, 1007, 1387, 2014, 2774, 3869, 4028, 5329, 5548, 7738, 10658, 15476, 21316, 73511, 101251, 147022, 202502, 282437, 294044, 405004, 564874, 1129748, 5366303, 10732606, 21465212]

約数ペア:

[(1, 21465212), (2, 10732606), (4, 5366303), (19, 1129748), (38, 564874), (53, 405004), (73, 294044), (76, 282437), (106, 202502), (146, 147022), (212, 101251), (292, 73511), (1007, 21316), (1387, 15476), (2014, 10658), (2774, 7738), (3869, 5548), (4028, 5329)]