20458485

素因数分解:

$3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{257}}^1$

素因数の和:358

約数の個数: 48

約数和(自身を含む): 37430640

約数和(自身を除く): 16972155

約数列:

[1, 3, 5, 9, 15, 29, 45, 61, 87, 145, 183, 257, 261, 305, 435, 549, 771, 915, 1285, 1305, 1769, 2313, 2745, 3855, 5307, 7453, 8845, 11565, 15677, 15921, 22359, 26535, 37265, 47031, 67077, 78385, 79605, 111795, 141093, 235155, 335385, 454633, 705465, 1363899, 2273165, 4091697, 6819495, 20458485]

約数ペア:

[(1, 20458485), (3, 6819495), (5, 4091697), (9, 2273165), (15, 1363899), (29, 705465), (45, 454633), (61, 335385), (87, 235155), (145, 141093), (183, 111795), (257, 79605), (261, 78385), (305, 67077), (435, 47031), (549, 37265), (771, 26535), (915, 22359), (1285, 15921), (1305, 15677), (1769, 11565), (2313, 8845), (2745, 7453), (3855, 5307)]