21145280

素因数分解:

$2^6\times 5^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{23}}^1$

素因数の和:83

約数の個数: 168

約数和(自身を含む): 60240672

約数和(自身を除く): 39095392

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 17, 20, 23, 26, 32, 34, 40, 46, 52, 64, 65, 68, 80, 85, 92, 104, 115, 130, 136, 160, 169, 170, 184, 208, 221, 230, 260, 272, 299, 320, 338, 340, 368, 391, 416, 442, 460, 520, 544, 598, 676, 680, 736, 782, 832, 845, 884, 920, 1040, 1088, 1105, 1196, 1352, 1360, 1472, 1495, 1564, 1690, 1768, 1840, 1955, 2080, 2210, 2392, 2704, 2720, 2873, 2990, 3128, 3380, 3536, 3680, 3887, 3910, 4160, 4420, 4784, 5083, 5408, 5440, 5746, 5980, 6256, 6760, 7072, 7360, 7774, 7820, 8840, 9568, 10166, 10816, 11492, 11960, 12512, 13520, 14144, 14365, 15548, 15640, 17680, 19136, 19435, 20332, 22984, 23920, 25024, 25415, 27040, 28730, 31096, 31280, 35360, 38870, 40664, 45968, 47840, 50830, 54080, 57460, 62192, 62560, 66079, 70720, 77740, 81328, 91936, 95680, 101660, 114920, 124384, 125120, 132158, 155480, 162656, 183872, 203320, 229840, 248768, 264316, 310960, 325312, 330395, 406640, 459680, 528632, 621920, 660790, 813280, 919360, 1057264, 1243840, 1321580, 1626560, 2114528, 2643160, 4229056, 5286320, 10572640, 21145280]

約数ペア:

[(1, 21145280), (2, 10572640), (4, 5286320), (5, 4229056), (8, 2643160), (10, 2114528), (13, 1626560), (16, 1321580), (17, 1243840), (20, 1057264), (23, 919360), (26, 813280), (32, 660790), (34, 621920), (40, 528632), (46, 459680), (52, 406640), (64, 330395), (65, 325312), (68, 310960), (80, 264316), (85, 248768), (92, 229840), (104, 203320), (115, 183872), (130, 162656), (136, 155480), (160, 132158), (169, 125120), (170, 124384), (184, 114920), (208, 101660), (221, 95680), (230, 91936), (260, 81328), (272, 77740), (299, 70720), (320, 66079), (338, 62560), (340, 62192), (368, 57460), (391, 54080), (416, 50830), (442, 47840), (460, 45968), (520, 40664), (544, 38870), (598, 35360), (676, 31280), (680, 31096), (736, 28730), (782, 27040), (832, 25415), (845, 25024), (884, 23920), (920, 22984), (1040, 20332), (1088, 19435), (1105, 19136), (1196, 17680), (1352, 15640), (1360, 15548), (1472, 14365), (1495, 14144), (1564, 13520), (1690, 12512), (1768, 11960), (1840, 11492), (1955, 10816), (2080, 10166), (2210, 9568), (2392, 8840), (2704, 7820), (2720, 7774), (2873, 7360), (2990, 7072), (3128, 6760), (3380, 6256), (3536, 5980), (3680, 5746), (3887, 5440), (3910, 5408), (4160, 5083), (4420, 4784)]