21999120

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{641}}^1$

素因数の和:681

約数の個数: 160

約数和(自身を含む): 80244864

約数和(自身を除く): 58245744

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 13, 15, 16, 20, 22, 24, 26, 30, 33, 39, 40, 44, 48, 52, 55, 60, 65, 66, 78, 80, 88, 104, 110, 120, 130, 132, 143, 156, 165, 176, 195, 208, 220, 240, 260, 264, 286, 312, 330, 390, 429, 440, 520, 528, 572, 624, 641, 660, 715, 780, 858, 880, 1040, 1144, 1282, 1320, 1430, 1560, 1716, 1923, 2145, 2288, 2564, 2640, 2860, 3120, 3205, 3432, 3846, 4290, 5128, 5720, 6410, 6864, 7051, 7692, 8333, 8580, 9615, 10256, 11440, 12820, 14102, 15384, 16666, 17160, 19230, 21153, 24999, 25640, 28204, 30768, 33332, 34320, 35255, 38460, 41665, 42306, 49998, 51280, 56408, 66664, 70510, 76920, 83330, 84612, 91663, 99996, 105765, 112816, 124995, 133328, 141020, 153840, 166660, 169224, 183326, 199992, 211530, 249990, 274989, 282040, 333320, 338448, 366652, 399984, 423060, 458315, 499980, 549978, 564080, 666640, 733304, 846120, 916630, 999960, 1099956, 1374945, 1466608, 1692240, 1833260, 1999920, 2199912, 2749890, 3666520, 4399824, 5499780, 7333040, 10999560, 21999120]

約数ペア:

[(1, 21999120), (2, 10999560), (3, 7333040), (4, 5499780), (5, 4399824), (6, 3666520), (8, 2749890), (10, 2199912), (11, 1999920), (12, 1833260), (13, 1692240), (15, 1466608), (16, 1374945), (20, 1099956), (22, 999960), (24, 916630), (26, 846120), (30, 733304), (33, 666640), (39, 564080), (40, 549978), (44, 499980), (48, 458315), (52, 423060), (55, 399984), (60, 366652), (65, 338448), (66, 333320), (78, 282040), (80, 274989), (88, 249990), (104, 211530), (110, 199992), (120, 183326), (130, 169224), (132, 166660), (143, 153840), (156, 141020), (165, 133328), (176, 124995), (195, 112816), (208, 105765), (220, 99996), (240, 91663), (260, 84612), (264, 83330), (286, 76920), (312, 70510), (330, 66664), (390, 56408), (429, 51280), (440, 49998), (520, 42306), (528, 41665), (572, 38460), (624, 35255), (641, 34320), (660, 33332), (715, 30768), (780, 28204), (858, 25640), (880, 24999), (1040, 21153), (1144, 19230), (1282, 17160), (1320, 16666), (1430, 15384), (1560, 14102), (1716, 12820), (1923, 11440), (2145, 10256), (2288, 9615), (2564, 8580), (2640, 8333), (2860, 7692), (3120, 7051), (3205, 6864), (3432, 6410), (3846, 5720), (4290, 5128)]