20291445

素因数分解:

$3^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{73}}^1$

素因数の和:187

約数の個数: 64

約数和(自身を含む): 38361600

約数和(自身を除く): 18070155

約数列:

[1, 3, 5, 9, 15, 27, 29, 45, 71, 73, 87, 135, 145, 213, 219, 261, 355, 365, 435, 639, 657, 783, 1065, 1095, 1305, 1917, 1971, 2059, 2117, 3195, 3285, 3915, 5183, 6177, 6351, 9585, 9855, 10295, 10585, 15549, 18531, 19053, 25915, 30885, 31755, 46647, 55593, 57159, 77745, 92655, 95265, 139941, 150307, 233235, 277965, 285795, 450921, 699705, 751535, 1352763, 2254605, 4058289, 6763815, 20291445]

約数ペア:

[(1, 20291445), (3, 6763815), (5, 4058289), (9, 2254605), (15, 1352763), (27, 751535), (29, 699705), (45, 450921), (71, 285795), (73, 277965), (87, 233235), (135, 150307), (145, 139941), (213, 95265), (219, 92655), (261, 77745), (355, 57159), (365, 55593), (435, 46647), (639, 31755), (657, 30885), (783, 25915), (1065, 19053), (1095, 18531), (1305, 15549), (1917, 10585), (1971, 10295), (2059, 9855), (2117, 9585), (3195, 6351), (3285, 6177), (3915, 5183)]