20872020

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{26759}}^1$

素因数の和:26784

約数の個数: 48

約数和(自身を含む): 62939520

約数和(自身を除く): 42067500

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 26759, 53518, 80277, 107036, 133795, 160554, 267590, 321108, 347867, 401385, 535180, 695734, 802770, 1043601, 1391468, 1605540, 1739335, 2087202, 3478670, 4174404, 5218005, 6957340, 10436010, 20872020]

約数ペア:

[(1, 20872020), (2, 10436010), (3, 6957340), (4, 5218005), (5, 4174404), (6, 3478670), (10, 2087202), (12, 1739335), (13, 1605540), (15, 1391468), (20, 1043601), (26, 802770), (30, 695734), (39, 535180), (52, 401385), (60, 347867), (65, 321108), (78, 267590), (130, 160554), (156, 133795), (195, 107036), (260, 80277), (390, 53518), (780, 26759)]