21057560

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{173}}^1\times {\mathrm{179}}^1$

素因数の和:380

約数の個数: 64

約数和(自身を含む): 50738400

約数和(自身を除く): 29680840

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 173, 179, 340, 346, 358, 680, 692, 716, 865, 895, 1384, 1432, 1730, 1790, 2941, 3043, 3460, 3580, 5882, 6086, 6920, 7160, 11764, 12172, 14705, 15215, 23528, 24344, 29410, 30430, 30967, 58820, 60860, 61934, 117640, 121720, 123868, 154835, 247736, 309670, 526439, 619340, 1052878, 1238680, 2105756, 2632195, 4211512, 5264390, 10528780, 21057560]

約数ペア:

[(1, 21057560), (2, 10528780), (4, 5264390), (5, 4211512), (8, 2632195), (10, 2105756), (17, 1238680), (20, 1052878), (34, 619340), (40, 526439), (68, 309670), (85, 247736), (136, 154835), (170, 123868), (173, 121720), (179, 117640), (340, 61934), (346, 60860), (358, 58820), (680, 30967), (692, 30430), (716, 29410), (865, 24344), (895, 23528), (1384, 15215), (1432, 14705), (1730, 12172), (1790, 11764), (2941, 7160), (3043, 6920), (3460, 6086), (3580, 5882)]