18077720

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{73}}^1\times {\mathrm{151}}^1$

素因数の和:276

約数の個数: 64

約数和(自身を含む): 42517440

約数和(自身を除く): 24439720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 73, 82, 146, 151, 164, 205, 292, 302, 328, 365, 410, 584, 604, 730, 755, 820, 1208, 1460, 1510, 1640, 2920, 2993, 3020, 5986, 6040, 6191, 11023, 11972, 12382, 14965, 22046, 23944, 24764, 29930, 30955, 44092, 49528, 55115, 59860, 61910, 88184, 110230, 119720, 123820, 220460, 247640, 440920, 451943, 903886, 1807772, 2259715, 3615544, 4519430, 9038860, 18077720]

約数ペア:

[(1, 18077720), (2, 9038860), (4, 4519430), (5, 3615544), (8, 2259715), (10, 1807772), (20, 903886), (40, 451943), (41, 440920), (73, 247640), (82, 220460), (146, 123820), (151, 119720), (164, 110230), (205, 88184), (292, 61910), (302, 59860), (328, 55115), (365, 49528), (410, 44092), (584, 30955), (604, 29930), (730, 24764), (755, 23944), (820, 22046), (1208, 14965), (1460, 12382), (1510, 11972), (1640, 11023), (2920, 6191), (2993, 6040), (3020, 5986)]