20395120

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{59}}^1\times {\mathrm{149}}^1$

素因数の和:250

約数の個数: 80

約数和(自身を含む): 50220000

約数和(自身を除く): 29824880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 40, 58, 59, 80, 116, 118, 145, 149, 232, 236, 290, 295, 298, 464, 472, 580, 590, 596, 745, 944, 1160, 1180, 1192, 1490, 1711, 2320, 2360, 2384, 2980, 3422, 4321, 4720, 5960, 6844, 8555, 8642, 8791, 11920, 13688, 17110, 17284, 17582, 21605, 27376, 34220, 34568, 35164, 43210, 43955, 68440, 69136, 70328, 86420, 87910, 136880, 140656, 172840, 175820, 254939, 345680, 351640, 509878, 703280, 1019756, 1274695, 2039512, 2549390, 4079024, 5098780, 10197560, 20395120]

約数ペア:

[(1, 20395120), (2, 10197560), (4, 5098780), (5, 4079024), (8, 2549390), (10, 2039512), (16, 1274695), (20, 1019756), (29, 703280), (40, 509878), (58, 351640), (59, 345680), (80, 254939), (116, 175820), (118, 172840), (145, 140656), (149, 136880), (232, 87910), (236, 86420), (290, 70328), (295, 69136), (298, 68440), (464, 43955), (472, 43210), (580, 35164), (590, 34568), (596, 34220), (745, 27376), (944, 21605), (1160, 17582), (1180, 17284), (1192, 17110), (1490, 13688), (1711, 11920), (2320, 8791), (2360, 8642), (2384, 8555), (2980, 6844), (3422, 5960), (4321, 4720)]