18997760

素因数分解:

$2^9\times 5^1\times {\mathrm{41}}^1\times {\mathrm{181}}^1$

素因数の和:245

約数の個数: 80

約数和(自身を含む): 46918872

約数和(自身を除く): 27921112

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 64, 80, 82, 128, 160, 164, 181, 205, 256, 320, 328, 362, 410, 512, 640, 656, 724, 820, 905, 1280, 1312, 1448, 1640, 1810, 2560, 2624, 2896, 3280, 3620, 5248, 5792, 6560, 7240, 7421, 10496, 11584, 13120, 14480, 14842, 20992, 23168, 26240, 28960, 29684, 37105, 46336, 52480, 57920, 59368, 74210, 92672, 104960, 115840, 118736, 148420, 231680, 237472, 296840, 463360, 474944, 593680, 949888, 1187360, 1899776, 2374720, 3799552, 4749440, 9498880, 18997760]

約数ペア:

[(1, 18997760), (2, 9498880), (4, 4749440), (5, 3799552), (8, 2374720), (10, 1899776), (16, 1187360), (20, 949888), (32, 593680), (40, 474944), (41, 463360), (64, 296840), (80, 237472), (82, 231680), (128, 148420), (160, 118736), (164, 115840), (181, 104960), (205, 92672), (256, 74210), (320, 59368), (328, 57920), (362, 52480), (410, 46336), (512, 37105), (640, 29684), (656, 28960), (724, 26240), (820, 23168), (905, 20992), (1280, 14842), (1312, 14480), (1448, 13120), (1640, 11584), (1810, 10496), (2560, 7421), (2624, 7240), (2896, 6560), (3280, 5792), (3620, 5248)]