19901440

素因数分解:

$2^{10}\times 5^1\times {\mathrm{13}}^2\times {\mathrm{23}}^1$

素因数の和:74

約数の個数: 132

約数和(自身を含む): 53942544

約数和(自身を除く): 34041104

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 23, 26, 32, 40, 46, 52, 64, 65, 80, 92, 104, 115, 128, 130, 160, 169, 184, 208, 230, 256, 260, 299, 320, 338, 368, 416, 460, 512, 520, 598, 640, 676, 736, 832, 845, 920, 1024, 1040, 1196, 1280, 1352, 1472, 1495, 1664, 1690, 1840, 2080, 2392, 2560, 2704, 2944, 2990, 3328, 3380, 3680, 3887, 4160, 4784, 5120, 5408, 5888, 5980, 6656, 6760, 7360, 7774, 8320, 9568, 10816, 11776, 11960, 13312, 13520, 14720, 15548, 16640, 19136, 19435, 21632, 23552, 23920, 27040, 29440, 31096, 33280, 38272, 38870, 43264, 47840, 54080, 58880, 62192, 66560, 76544, 77740, 86528, 95680, 108160, 117760, 124384, 153088, 155480, 173056, 191360, 216320, 248768, 306176, 310960, 382720, 432640, 497536, 621920, 765440, 865280, 995072, 1243840, 1530880, 1990144, 2487680, 3980288, 4975360, 9950720, 19901440]

約数ペア:

[(1, 19901440), (2, 9950720), (4, 4975360), (5, 3980288), (8, 2487680), (10, 1990144), (13, 1530880), (16, 1243840), (20, 995072), (23, 865280), (26, 765440), (32, 621920), (40, 497536), (46, 432640), (52, 382720), (64, 310960), (65, 306176), (80, 248768), (92, 216320), (104, 191360), (115, 173056), (128, 155480), (130, 153088), (160, 124384), (169, 117760), (184, 108160), (208, 95680), (230, 86528), (256, 77740), (260, 76544), (299, 66560), (320, 62192), (338, 58880), (368, 54080), (416, 47840), (460, 43264), (512, 38870), (520, 38272), (598, 33280), (640, 31096), (676, 29440), (736, 27040), (832, 23920), (845, 23552), (920, 21632), (1024, 19435), (1040, 19136), (1196, 16640), (1280, 15548), (1352, 14720), (1472, 13520), (1495, 13312), (1664, 11960), (1690, 11776), (1840, 10816), (2080, 9568), (2392, 8320), (2560, 7774), (2704, 7360), (2944, 6760), (2990, 6656), (3328, 5980), (3380, 5888), (3680, 5408), (3887, 5120), (4160, 4784)]