18951165

素因数分解:

$3^4\times 5^1\times {\mathrm{73}}^1\times {\mathrm{641}}^1$

素因数の和:731

約数の個数: 40

約数和(自身を含む): 34490808

約数和(自身を除く): 15539643

約数列:

[1, 3, 5, 9, 15, 27, 45, 73, 81, 135, 219, 365, 405, 641, 657, 1095, 1923, 1971, 3205, 3285, 5769, 5913, 9615, 9855, 17307, 28845, 29565, 46793, 51921, 86535, 140379, 233965, 259605, 421137, 701895, 1263411, 2105685, 3790233, 6317055, 18951165]

約数ペア:

[(1, 18951165), (3, 6317055), (5, 3790233), (9, 2105685), (15, 1263411), (27, 701895), (45, 421137), (73, 259605), (81, 233965), (135, 140379), (219, 86535), (365, 51921), (405, 46793), (641, 29565), (657, 28845), (1095, 17307), (1923, 9855), (1971, 9615), (3205, 5913), (3285, 5769)]