21473985

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{43}}^1\times {\mathrm{197}}^1$

素因数の和:274

約数の個数: 48

約数和(自身を含む): 38263104

約数和(自身を除く): 16789119

約数列:

[1, 3, 5, 13, 15, 39, 43, 65, 129, 169, 195, 197, 215, 507, 559, 591, 645, 845, 985, 1677, 2535, 2561, 2795, 2955, 7267, 7683, 8385, 8471, 12805, 21801, 25413, 33293, 36335, 38415, 42355, 99879, 109005, 110123, 127065, 166465, 330369, 499395, 550615, 1431599, 1651845, 4294797, 7157995, 21473985]

約数ペア:

[(1, 21473985), (3, 7157995), (5, 4294797), (13, 1651845), (15, 1431599), (39, 550615), (43, 499395), (65, 330369), (129, 166465), (169, 127065), (195, 110123), (197, 109005), (215, 99879), (507, 42355), (559, 38415), (591, 36335), (645, 33293), (845, 25413), (985, 21801), (1677, 12805), (2535, 8471), (2561, 8385), (2795, 7683), (2955, 7267)]