18957915

素因数分解:

$3^3\times 5^1\times {\mathrm{19}}^2\times {\mathrm{389}}^1$

素因数の和:441

約数の個数: 48

約数和(自身を含む): 35661600

約数和(自身を除く): 16703685

約数列:

[1, 3, 5, 9, 15, 19, 27, 45, 57, 95, 135, 171, 285, 361, 389, 513, 855, 1083, 1167, 1805, 1945, 2565, 3249, 3501, 5415, 5835, 7391, 9747, 10503, 16245, 17505, 22173, 36955, 48735, 52515, 66519, 110865, 140429, 199557, 332595, 421287, 702145, 997785, 1263861, 2106435, 3791583, 6319305, 18957915]

約数ペア:

[(1, 18957915), (3, 6319305), (5, 3791583), (9, 2106435), (15, 1263861), (19, 997785), (27, 702145), (45, 421287), (57, 332595), (95, 199557), (135, 140429), (171, 110865), (285, 66519), (361, 52515), (389, 48735), (513, 36955), (855, 22173), (1083, 17505), (1167, 16245), (1805, 10503), (1945, 9747), (2565, 7391), (3249, 5835), (3501, 5415)]