18381220

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{6427}}^1$

素因数の和:6460

約数の個数: 48

約数和(自身を含む): 45355968

約数和(自身を除く): 26974748

約数列:

[1, 2, 4, 5, 10, 11, 13, 20, 22, 26, 44, 52, 55, 65, 110, 130, 143, 220, 260, 286, 572, 715, 1430, 2860, 6427, 12854, 25708, 32135, 64270, 70697, 83551, 128540, 141394, 167102, 282788, 334204, 353485, 417755, 706970, 835510, 919061, 1413940, 1671020, 1838122, 3676244, 4595305, 9190610, 18381220]

約数ペア:

[(1, 18381220), (2, 9190610), (4, 4595305), (5, 3676244), (10, 1838122), (11, 1671020), (13, 1413940), (20, 919061), (22, 835510), (26, 706970), (44, 417755), (52, 353485), (55, 334204), (65, 282788), (110, 167102), (130, 141394), (143, 128540), (220, 83551), (260, 70697), (286, 64270), (572, 32135), (715, 25708), (1430, 12854), (2860, 6427)]