21468915

素因数分解:

$3^3\times 5^1\times {\mathrm{13}}^2\times {\mathrm{941}}^1$

素因数の和:981

約数の個数: 48

約数和(自身を含む): 41372640

約数和(自身を除く): 19903725

約数列:

[1, 3, 5, 9, 13, 15, 27, 39, 45, 65, 117, 135, 169, 195, 351, 507, 585, 845, 941, 1521, 1755, 2535, 2823, 4563, 4705, 7605, 8469, 12233, 14115, 22815, 25407, 36699, 42345, 61165, 110097, 127035, 159029, 183495, 330291, 477087, 550485, 795145, 1431261, 1651455, 2385435, 4293783, 7156305, 21468915]

約数ペア:

[(1, 21468915), (3, 7156305), (5, 4293783), (9, 2385435), (13, 1651455), (15, 1431261), (27, 795145), (39, 550485), (45, 477087), (65, 330291), (117, 183495), (135, 159029), (169, 127035), (195, 110097), (351, 61165), (507, 42345), (585, 36699), (845, 25407), (941, 22815), (1521, 14115), (1755, 12233), (2535, 8469), (2823, 7605), (4563, 4705)]