21787440

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{3947}}^1$

素因数の和:3986

約数の個数: 80

約数和(自身を含む): 70495488

約数和(自身を除く): 48708048

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 23, 24, 30, 40, 46, 48, 60, 69, 80, 92, 115, 120, 138, 184, 230, 240, 276, 345, 368, 460, 552, 690, 920, 1104, 1380, 1840, 2760, 3947, 5520, 7894, 11841, 15788, 19735, 23682, 31576, 39470, 47364, 59205, 63152, 78940, 90781, 94728, 118410, 157880, 181562, 189456, 236820, 272343, 315760, 363124, 453905, 473640, 544686, 726248, 907810, 947280, 1089372, 1361715, 1452496, 1815620, 2178744, 2723430, 3631240, 4357488, 5446860, 7262480, 10893720, 21787440]

約数ペア:

[(1, 21787440), (2, 10893720), (3, 7262480), (4, 5446860), (5, 4357488), (6, 3631240), (8, 2723430), (10, 2178744), (12, 1815620), (15, 1452496), (16, 1361715), (20, 1089372), (23, 947280), (24, 907810), (30, 726248), (40, 544686), (46, 473640), (48, 453905), (60, 363124), (69, 315760), (80, 272343), (92, 236820), (115, 189456), (120, 181562), (138, 157880), (184, 118410), (230, 94728), (240, 90781), (276, 78940), (345, 63152), (368, 59205), (460, 47364), (552, 39470), (690, 31576), (920, 23682), (1104, 19735), (1380, 15788), (1840, 11841), (2760, 7894), (3947, 5520)]