21604960

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{47}}^1$

素因数の和:105

約数の個数: 144

約数和(自身を含む): 59766336

約数和(自身を除く): 38161376

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 17, 20, 26, 32, 34, 40, 47, 52, 65, 68, 80, 85, 94, 104, 130, 136, 160, 169, 170, 188, 208, 221, 235, 260, 272, 338, 340, 376, 416, 442, 470, 520, 544, 611, 676, 680, 752, 799, 845, 884, 940, 1040, 1105, 1222, 1352, 1360, 1504, 1598, 1690, 1768, 1880, 2080, 2210, 2444, 2704, 2720, 2873, 3055, 3196, 3380, 3536, 3760, 3995, 4420, 4888, 5408, 5746, 6110, 6392, 6760, 7072, 7520, 7943, 7990, 8840, 9776, 10387, 11492, 12220, 12784, 13520, 14365, 15886, 15980, 17680, 19552, 20774, 22984, 24440, 25568, 27040, 28730, 31772, 31960, 35360, 39715, 41548, 45968, 48880, 51935, 57460, 63544, 63920, 79430, 83096, 91936, 97760, 103870, 114920, 127088, 127840, 135031, 158860, 166192, 207740, 229840, 254176, 270062, 317720, 332384, 415480, 459680, 540124, 635440, 675155, 830960, 1080248, 1270880, 1350310, 1661920, 2160496, 2700620, 4320992, 5401240, 10802480, 21604960]

約数ペア:

[(1, 21604960), (2, 10802480), (4, 5401240), (5, 4320992), (8, 2700620), (10, 2160496), (13, 1661920), (16, 1350310), (17, 1270880), (20, 1080248), (26, 830960), (32, 675155), (34, 635440), (40, 540124), (47, 459680), (52, 415480), (65, 332384), (68, 317720), (80, 270062), (85, 254176), (94, 229840), (104, 207740), (130, 166192), (136, 158860), (160, 135031), (169, 127840), (170, 127088), (188, 114920), (208, 103870), (221, 97760), (235, 91936), (260, 83096), (272, 79430), (338, 63920), (340, 63544), (376, 57460), (416, 51935), (442, 48880), (470, 45968), (520, 41548), (544, 39715), (611, 35360), (676, 31960), (680, 31772), (752, 28730), (799, 27040), (845, 25568), (884, 24440), (940, 22984), (1040, 20774), (1105, 19552), (1222, 17680), (1352, 15980), (1360, 15886), (1504, 14365), (1598, 13520), (1690, 12784), (1768, 12220), (1880, 11492), (2080, 10387), (2210, 9776), (2444, 8840), (2704, 7990), (2720, 7943), (2873, 7520), (3055, 7072), (3196, 6760), (3380, 6392), (3536, 6110), (3760, 5746), (3995, 5408), (4420, 4888)]