18280280

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{359}}^1$

素因数の和:456

約数の個数: 64

約数和(自身を含む): 44064000

約数和(自身を除く): 25783720

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 67, 76, 95, 134, 152, 190, 268, 335, 359, 380, 536, 670, 718, 760, 1273, 1340, 1436, 1795, 2546, 2680, 2872, 3590, 5092, 6365, 6821, 7180, 10184, 12730, 13642, 14360, 24053, 25460, 27284, 34105, 48106, 50920, 54568, 68210, 96212, 120265, 136420, 192424, 240530, 272840, 457007, 481060, 914014, 962120, 1828028, 2285035, 3656056, 4570070, 9140140, 18280280]

約数ペア:

[(1, 18280280), (2, 9140140), (4, 4570070), (5, 3656056), (8, 2285035), (10, 1828028), (19, 962120), (20, 914014), (38, 481060), (40, 457007), (67, 272840), (76, 240530), (95, 192424), (134, 136420), (152, 120265), (190, 96212), (268, 68210), (335, 54568), (359, 50920), (380, 48106), (536, 34105), (670, 27284), (718, 25460), (760, 24053), (1273, 14360), (1340, 13642), (1436, 12730), (1795, 10184), (2546, 7180), (2680, 6821), (2872, 6365), (3590, 5092)]