18779960

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{137}}^1\times {\mathrm{149}}^1$

素因数の和:320

約数の個数: 64

約数和(自身を含む): 44712000

約数和(自身を除く): 25932040

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 92, 115, 137, 149, 184, 230, 274, 298, 460, 548, 596, 685, 745, 920, 1096, 1192, 1370, 1490, 2740, 2980, 3151, 3427, 5480, 5960, 6302, 6854, 12604, 13708, 15755, 17135, 20413, 25208, 27416, 31510, 34270, 40826, 63020, 68540, 81652, 102065, 126040, 137080, 163304, 204130, 408260, 469499, 816520, 938998, 1877996, 2347495, 3755992, 4694990, 9389980, 18779960]

約数ペア:

[(1, 18779960), (2, 9389980), (4, 4694990), (5, 3755992), (8, 2347495), (10, 1877996), (20, 938998), (23, 816520), (40, 469499), (46, 408260), (92, 204130), (115, 163304), (137, 137080), (149, 126040), (184, 102065), (230, 81652), (274, 68540), (298, 63020), (460, 40826), (548, 34270), (596, 31510), (685, 27416), (745, 25208), (920, 20413), (1096, 17135), (1192, 15755), (1370, 13708), (1490, 12604), (2740, 6854), (2980, 6302), (3151, 5960), (3427, 5480)]