20863760

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^2\times {\mathrm{29}}^1$

素因数の和:105

約数の個数: 120

約数和(自身を含む): 55543320

約数和(自身を除く): 34679560

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 23, 29, 34, 40, 46, 58, 68, 80, 85, 92, 115, 116, 136, 145, 170, 184, 230, 232, 272, 290, 340, 368, 391, 460, 464, 493, 529, 580, 667, 680, 782, 920, 986, 1058, 1160, 1334, 1360, 1564, 1840, 1955, 1972, 2116, 2320, 2465, 2645, 2668, 3128, 3335, 3910, 3944, 4232, 4930, 5290, 5336, 6256, 6670, 7820, 7888, 8464, 8993, 9860, 10580, 10672, 11339, 13340, 15341, 15640, 17986, 19720, 21160, 22678, 26680, 30682, 31280, 35972, 39440, 42320, 44965, 45356, 53360, 56695, 61364, 71944, 76705, 89930, 90712, 113390, 122728, 143888, 153410, 179860, 181424, 226780, 245456, 260797, 306820, 359720, 453560, 521594, 613640, 719440, 907120, 1043188, 1227280, 1303985, 2086376, 2607970, 4172752, 5215940, 10431880, 20863760]

約数ペア:

[(1, 20863760), (2, 10431880), (4, 5215940), (5, 4172752), (8, 2607970), (10, 2086376), (16, 1303985), (17, 1227280), (20, 1043188), (23, 907120), (29, 719440), (34, 613640), (40, 521594), (46, 453560), (58, 359720), (68, 306820), (80, 260797), (85, 245456), (92, 226780), (115, 181424), (116, 179860), (136, 153410), (145, 143888), (170, 122728), (184, 113390), (230, 90712), (232, 89930), (272, 76705), (290, 71944), (340, 61364), (368, 56695), (391, 53360), (460, 45356), (464, 44965), (493, 42320), (529, 39440), (580, 35972), (667, 31280), (680, 30682), (782, 26680), (920, 22678), (986, 21160), (1058, 19720), (1160, 17986), (1334, 15640), (1360, 15341), (1564, 13340), (1840, 11339), (1955, 10672), (1972, 10580), (2116, 9860), (2320, 8993), (2465, 8464), (2645, 7888), (2668, 7820), (3128, 6670), (3335, 6256), (3910, 5336), (3944, 5290), (4232, 4930)]