21908460

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{52163}}^1$

素因数の和:52182

約数の個数: 48

約数和(自身を含む): 70108416

約数和(自身を除く): 48199956

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 52163, 104326, 156489, 208652, 260815, 312978, 365141, 521630, 625956, 730282, 782445, 1043260, 1095423, 1460564, 1564890, 1825705, 2190846, 3129780, 3651410, 4381692, 5477115, 7302820, 10954230, 21908460]

約数ペア:

[(1, 21908460), (2, 10954230), (3, 7302820), (4, 5477115), (5, 4381692), (6, 3651410), (7, 3129780), (10, 2190846), (12, 1825705), (14, 1564890), (15, 1460564), (20, 1095423), (21, 1043260), (28, 782445), (30, 730282), (35, 625956), (42, 521630), (60, 365141), (70, 312978), (84, 260815), (105, 208652), (140, 156489), (210, 104326), (420, 52163)]