90801080

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{1993}}^1$

素因数の和:2088

約数の個数: 64

約数和(自身を含む): 219659040

約数和(自身を除く): 128857960

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 67, 68, 85, 134, 136, 170, 268, 335, 340, 536, 670, 680, 1139, 1340, 1993, 2278, 2680, 3986, 4556, 5695, 7972, 9112, 9965, 11390, 15944, 19930, 22780, 33881, 39860, 45560, 67762, 79720, 133531, 135524, 169405, 267062, 271048, 338810, 534124, 667655, 677620, 1068248, 1335310, 1355240, 2270027, 2670620, 4540054, 5341240, 9080108, 11350135, 18160216, 22700270, 45400540, 90801080]

約数ペア:

[(1, 90801080), (2, 45400540), (4, 22700270), (5, 18160216), (8, 11350135), (10, 9080108), (17, 5341240), (20, 4540054), (34, 2670620), (40, 2270027), (67, 1355240), (68, 1335310), (85, 1068248), (134, 677620), (136, 667655), (170, 534124), (268, 338810), (335, 271048), (340, 267062), (536, 169405), (670, 135524), (680, 133531), (1139, 79720), (1340, 67762), (1993, 45560), (2278, 39860), (2680, 33881), (3986, 22780), (4556, 19930), (5695, 15944), (7972, 11390), (9112, 9965)]