21454895

素因数分解:

$5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{419}}^1$

素因数の和:468

約数の個数: 48

約数和(自身を含む): 34473600

約数和(自身を除く): 13018705

約数列:

[1, 5, 7, 11, 19, 35, 49, 55, 77, 95, 133, 209, 245, 385, 419, 539, 665, 931, 1045, 1463, 2095, 2695, 2933, 4609, 4655, 7315, 7961, 10241, 14665, 20531, 23045, 32263, 39805, 51205, 55727, 87571, 102655, 161315, 225841, 278635, 390089, 437855, 612997, 1129205, 1950445, 3064985, 4290979, 21454895]

約数ペア:

[(1, 21454895), (5, 4290979), (7, 3064985), (11, 1950445), (19, 1129205), (35, 612997), (49, 437855), (55, 390089), (77, 278635), (95, 225841), (133, 161315), (209, 102655), (245, 87571), (385, 55727), (419, 51205), (539, 39805), (665, 32263), (931, 23045), (1045, 20531), (1463, 14665), (2095, 10241), (2695, 7961), (2933, 7315), (4609, 4655)]