20417880

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{223}}^1$

素因数の和:353

約数の個数: 128

約数和(自身を含む): 70963200

約数和(自身を除く): 50545320

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 109, 120, 140, 168, 210, 218, 223, 280, 327, 420, 436, 446, 545, 654, 669, 763, 840, 872, 892, 1090, 1115, 1308, 1338, 1526, 1561, 1635, 1784, 2180, 2230, 2289, 2616, 2676, 3052, 3122, 3270, 3345, 3815, 4360, 4460, 4578, 4683, 5352, 6104, 6244, 6540, 6690, 7630, 7805, 8920, 9156, 9366, 11445, 12488, 13080, 13380, 15260, 15610, 18312, 18732, 22890, 23415, 24307, 26760, 30520, 31220, 37464, 45780, 46830, 48614, 62440, 72921, 91560, 93660, 97228, 121535, 145842, 170149, 187320, 194456, 243070, 291684, 340298, 364605, 486140, 510447, 583368, 680596, 729210, 850745, 972280, 1020894, 1361192, 1458420, 1701490, 2041788, 2552235, 2916840, 3402980, 4083576, 5104470, 6805960, 10208940, 20417880]

約数ペア:

[(1, 20417880), (2, 10208940), (3, 6805960), (4, 5104470), (5, 4083576), (6, 3402980), (7, 2916840), (8, 2552235), (10, 2041788), (12, 1701490), (14, 1458420), (15, 1361192), (20, 1020894), (21, 972280), (24, 850745), (28, 729210), (30, 680596), (35, 583368), (40, 510447), (42, 486140), (56, 364605), (60, 340298), (70, 291684), (84, 243070), (105, 194456), (109, 187320), (120, 170149), (140, 145842), (168, 121535), (210, 97228), (218, 93660), (223, 91560), (280, 72921), (327, 62440), (420, 48614), (436, 46830), (446, 45780), (545, 37464), (654, 31220), (669, 30520), (763, 26760), (840, 24307), (872, 23415), (892, 22890), (1090, 18732), (1115, 18312), (1308, 15610), (1338, 15260), (1526, 13380), (1561, 13080), (1635, 12488), (1784, 11445), (2180, 9366), (2230, 9156), (2289, 8920), (2616, 7805), (2676, 7630), (3052, 6690), (3122, 6540), (3270, 6244), (3345, 6104), (3815, 5352), (4360, 4683), (4460, 4578)]