9905920

素因数分解:

$2^8\times 5^1\times {\mathrm{71}}^1\times {\mathrm{109}}^1$

素因数の和:201

約数の個数: 72

約数和(自身を含む): 24282720

約数和(自身を除く): 14376800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 71, 80, 109, 128, 142, 160, 218, 256, 284, 320, 355, 436, 545, 568, 640, 710, 872, 1090, 1136, 1280, 1420, 1744, 2180, 2272, 2840, 3488, 4360, 4544, 5680, 6976, 7739, 8720, 9088, 11360, 13952, 15478, 17440, 18176, 22720, 27904, 30956, 34880, 38695, 45440, 61912, 69760, 77390, 90880, 123824, 139520, 154780, 247648, 309560, 495296, 619120, 990592, 1238240, 1981184, 2476480, 4952960, 9905920]

約数ペア:

[(1, 9905920), (2, 4952960), (4, 2476480), (5, 1981184), (8, 1238240), (10, 990592), (16, 619120), (20, 495296), (32, 309560), (40, 247648), (64, 154780), (71, 139520), (80, 123824), (109, 90880), (128, 77390), (142, 69760), (160, 61912), (218, 45440), (256, 38695), (284, 34880), (320, 30956), (355, 27904), (436, 22720), (545, 18176), (568, 17440), (640, 15478), (710, 13952), (872, 11360), (1090, 9088), (1136, 8720), (1280, 7739), (1420, 6976), (1744, 5680), (2180, 4544), (2272, 4360), (2840, 3488)]