18968560

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^2\times {\mathrm{23}}^1\times {\mathrm{61}}^1$

素因数の和:123

約数の個数: 120

約数和(自身を含む): 50648544

約数和(自身を除く): 31679984

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 23, 26, 40, 46, 52, 61, 65, 80, 92, 104, 115, 122, 130, 169, 184, 208, 230, 244, 260, 299, 305, 338, 368, 460, 488, 520, 598, 610, 676, 793, 845, 920, 976, 1040, 1196, 1220, 1352, 1403, 1495, 1586, 1690, 1840, 2392, 2440, 2704, 2806, 2990, 3172, 3380, 3887, 3965, 4784, 4880, 5612, 5980, 6344, 6760, 7015, 7774, 7930, 10309, 11224, 11960, 12688, 13520, 14030, 15548, 15860, 18239, 19435, 20618, 22448, 23920, 28060, 31096, 31720, 36478, 38870, 41236, 51545, 56120, 62192, 63440, 72956, 77740, 82472, 91195, 103090, 112240, 145912, 155480, 164944, 182390, 206180, 237107, 291824, 310960, 364780, 412360, 474214, 729560, 824720, 948428, 1185535, 1459120, 1896856, 2371070, 3793712, 4742140, 9484280, 18968560]

約数ペア:

[(1, 18968560), (2, 9484280), (4, 4742140), (5, 3793712), (8, 2371070), (10, 1896856), (13, 1459120), (16, 1185535), (20, 948428), (23, 824720), (26, 729560), (40, 474214), (46, 412360), (52, 364780), (61, 310960), (65, 291824), (80, 237107), (92, 206180), (104, 182390), (115, 164944), (122, 155480), (130, 145912), (169, 112240), (184, 103090), (208, 91195), (230, 82472), (244, 77740), (260, 72956), (299, 63440), (305, 62192), (338, 56120), (368, 51545), (460, 41236), (488, 38870), (520, 36478), (598, 31720), (610, 31096), (676, 28060), (793, 23920), (845, 22448), (920, 20618), (976, 19435), (1040, 18239), (1196, 15860), (1220, 15548), (1352, 14030), (1403, 13520), (1495, 12688), (1586, 11960), (1690, 11224), (1840, 10309), (2392, 7930), (2440, 7774), (2704, 7015), (2806, 6760), (2990, 6344), (3172, 5980), (3380, 5612), (3887, 4880), (3965, 4784)]