17990120

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{73}}^1\times {\mathrm{101}}^1$

素因数の和:246

約数の個数: 64

約数和(自身を含む): 42117840

約数和(自身を除く): 24127720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 73, 101, 122, 146, 202, 244, 292, 305, 365, 404, 488, 505, 584, 610, 730, 808, 1010, 1220, 1460, 2020, 2440, 2920, 4040, 4453, 6161, 7373, 8906, 12322, 14746, 17812, 22265, 24644, 29492, 30805, 35624, 36865, 44530, 49288, 58984, 61610, 73730, 89060, 123220, 147460, 178120, 246440, 294920, 449753, 899506, 1799012, 2248765, 3598024, 4497530, 8995060, 17990120]

約数ペア:

[(1, 17990120), (2, 8995060), (4, 4497530), (5, 3598024), (8, 2248765), (10, 1799012), (20, 899506), (40, 449753), (61, 294920), (73, 246440), (101, 178120), (122, 147460), (146, 123220), (202, 89060), (244, 73730), (292, 61610), (305, 58984), (365, 49288), (404, 44530), (488, 36865), (505, 35624), (584, 30805), (610, 29492), (730, 24644), (808, 22265), (1010, 17812), (1220, 14746), (1460, 12322), (2020, 8906), (2440, 7373), (2920, 6161), (4040, 4453)]