81406880

素因数分解:

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

素因数の和:378

約数の個数: 72

約数和(自身を含む): 204820812

約数和(自身を除く): 123413932

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 68, 80, 85, 136, 160, 170, 173, 272, 340, 346, 544, 680, 692, 865, 1360, 1384, 1730, 2720, 2768, 2941, 3460, 5536, 5882, 6920, 11764, 13840, 14705, 23528, 27680, 29410, 29929, 47056, 58820, 59858, 94112, 117640, 119716, 149645, 235280, 239432, 299290, 470560, 478864, 508793, 598580, 957728, 1017586, 1197160, 2035172, 2394320, 2543965, 4070344, 4788640, 5087930, 8140688, 10175860, 16281376, 20351720, 40703440, 81406880]

約数ペア:

[(1, 81406880), (2, 40703440), (4, 20351720), (5, 16281376), (8, 10175860), (10, 8140688), (16, 5087930), (17, 4788640), (20, 4070344), (32, 2543965), (34, 2394320), (40, 2035172), (68, 1197160), (80, 1017586), (85, 957728), (136, 598580), (160, 508793), (170, 478864), (173, 470560), (272, 299290), (340, 239432), (346, 235280), (544, 149645), (680, 119716), (692, 117640), (865, 94112), (1360, 59858), (1384, 58820), (1730, 47056), (2720, 29929), (2768, 29410), (2941, 27680), (3460, 23528), (5536, 14705), (5882, 13840), (6920, 11764)]