18225920

素因数分解:

$2^8\times 5^1\times {\mathrm{29}}^1\times {\mathrm{491}}^1$

素因数の和:541

約数の個数: 72

約数和(自身を含む): 45254160

約数和(自身を除く): 27028240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 32, 40, 58, 64, 80, 116, 128, 145, 160, 232, 256, 290, 320, 464, 491, 580, 640, 928, 982, 1160, 1280, 1856, 1964, 2320, 2455, 3712, 3928, 4640, 4910, 7424, 7856, 9280, 9820, 14239, 15712, 18560, 19640, 28478, 31424, 37120, 39280, 56956, 62848, 71195, 78560, 113912, 125696, 142390, 157120, 227824, 284780, 314240, 455648, 569560, 628480, 911296, 1139120, 1822592, 2278240, 3645184, 4556480, 9112960, 18225920]

約数ペア:

[(1, 18225920), (2, 9112960), (4, 4556480), (5, 3645184), (8, 2278240), (10, 1822592), (16, 1139120), (20, 911296), (29, 628480), (32, 569560), (40, 455648), (58, 314240), (64, 284780), (80, 227824), (116, 157120), (128, 142390), (145, 125696), (160, 113912), (232, 78560), (256, 71195), (290, 62848), (320, 56956), (464, 39280), (491, 37120), (580, 31424), (640, 28478), (928, 19640), (982, 18560), (1160, 15712), (1280, 14239), (1856, 9820), (1964, 9280), (2320, 7856), (2455, 7424), (3712, 4910), (3928, 4640)]