18909440

素因数分解:

$2^8\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1$

素因数の和:128

約数の個数: 144

約数和(自身を含む): 52980480

約数和(自身を除く): 34071040

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 17, 20, 22, 32, 34, 40, 44, 55, 64, 68, 79, 80, 85, 88, 110, 128, 136, 158, 160, 170, 176, 187, 220, 256, 272, 316, 320, 340, 352, 374, 395, 440, 544, 632, 640, 680, 704, 748, 790, 869, 880, 935, 1088, 1264, 1280, 1343, 1360, 1408, 1496, 1580, 1738, 1760, 1870, 2176, 2528, 2686, 2720, 2816, 2992, 3160, 3476, 3520, 3740, 4345, 4352, 5056, 5372, 5440, 5984, 6320, 6715, 6952, 7040, 7480, 8690, 10112, 10744, 10880, 11968, 12640, 13430, 13904, 14080, 14773, 14960, 17380, 20224, 21488, 21760, 23936, 25280, 26860, 27808, 29546, 29920, 34760, 42976, 47872, 50560, 53720, 55616, 59092, 59840, 69520, 73865, 85952, 101120, 107440, 111232, 118184, 119680, 139040, 147730, 171904, 214880, 222464, 236368, 239360, 278080, 295460, 343808, 429760, 472736, 556160, 590920, 859520, 945472, 1112320, 1181840, 1719040, 1890944, 2363680, 3781888, 4727360, 9454720, 18909440]

約数ペア:

[(1, 18909440), (2, 9454720), (4, 4727360), (5, 3781888), (8, 2363680), (10, 1890944), (11, 1719040), (16, 1181840), (17, 1112320), (20, 945472), (22, 859520), (32, 590920), (34, 556160), (40, 472736), (44, 429760), (55, 343808), (64, 295460), (68, 278080), (79, 239360), (80, 236368), (85, 222464), (88, 214880), (110, 171904), (128, 147730), (136, 139040), (158, 119680), (160, 118184), (170, 111232), (176, 107440), (187, 101120), (220, 85952), (256, 73865), (272, 69520), (316, 59840), (320, 59092), (340, 55616), (352, 53720), (374, 50560), (395, 47872), (440, 42976), (544, 34760), (632, 29920), (640, 29546), (680, 27808), (704, 26860), (748, 25280), (790, 23936), (869, 21760), (880, 21488), (935, 20224), (1088, 17380), (1264, 14960), (1280, 14773), (1343, 14080), (1360, 13904), (1408, 13430), (1496, 12640), (1580, 11968), (1738, 10880), (1760, 10744), (1870, 10112), (2176, 8690), (2528, 7480), (2686, 7040), (2720, 6952), (2816, 6715), (2992, 6320), (3160, 5984), (3476, 5440), (3520, 5372), (3740, 5056), (4345, 4352)]