20436880

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{383}}^1$

素因数の和:448

約数の個数: 80

約数和(自身を含む): 51425280

約数和(自身を除く): 30988400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 29, 40, 46, 58, 80, 92, 115, 116, 145, 184, 230, 232, 290, 368, 383, 460, 464, 580, 667, 766, 920, 1160, 1334, 1532, 1840, 1915, 2320, 2668, 3064, 3335, 3830, 5336, 6128, 6670, 7660, 8809, 10672, 11107, 13340, 15320, 17618, 22214, 26680, 30640, 35236, 44045, 44428, 53360, 55535, 70472, 88090, 88856, 111070, 140944, 176180, 177712, 222140, 255461, 352360, 444280, 510922, 704720, 888560, 1021844, 1277305, 2043688, 2554610, 4087376, 5109220, 10218440, 20436880]

約数ペア:

[(1, 20436880), (2, 10218440), (4, 5109220), (5, 4087376), (8, 2554610), (10, 2043688), (16, 1277305), (20, 1021844), (23, 888560), (29, 704720), (40, 510922), (46, 444280), (58, 352360), (80, 255461), (92, 222140), (115, 177712), (116, 176180), (145, 140944), (184, 111070), (230, 88856), (232, 88090), (290, 70472), (368, 55535), (383, 53360), (460, 44428), (464, 44045), (580, 35236), (667, 30640), (766, 26680), (920, 22214), (1160, 17618), (1334, 15320), (1532, 13340), (1840, 11107), (1915, 10672), (2320, 8809), (2668, 7660), (3064, 6670), (3335, 6128), (3830, 5336)]