21548240

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{23}}^1\times {\mathrm{239}}^1$

素因数の和:289

約数の個数: 120

約数和(自身を含む): 61067520

約数和(自身を除く): 39519280

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 23, 28, 35, 40, 46, 49, 56, 70, 80, 92, 98, 112, 115, 140, 161, 184, 196, 230, 239, 245, 280, 322, 368, 392, 460, 478, 490, 560, 644, 784, 805, 920, 956, 980, 1127, 1195, 1288, 1610, 1673, 1840, 1912, 1960, 2254, 2390, 2576, 3220, 3346, 3824, 3920, 4508, 4780, 5497, 5635, 6440, 6692, 8365, 9016, 9560, 10994, 11270, 11711, 12880, 13384, 16730, 18032, 19120, 21988, 22540, 23422, 26768, 27485, 33460, 38479, 43976, 45080, 46844, 54970, 58555, 66920, 76958, 87952, 90160, 93688, 109940, 117110, 133840, 153916, 187376, 192395, 219880, 234220, 269353, 307832, 384790, 439760, 468440, 538706, 615664, 769580, 936880, 1077412, 1346765, 1539160, 2154824, 2693530, 3078320, 4309648, 5387060, 10774120, 21548240]

約数ペア:

[(1, 21548240), (2, 10774120), (4, 5387060), (5, 4309648), (7, 3078320), (8, 2693530), (10, 2154824), (14, 1539160), (16, 1346765), (20, 1077412), (23, 936880), (28, 769580), (35, 615664), (40, 538706), (46, 468440), (49, 439760), (56, 384790), (70, 307832), (80, 269353), (92, 234220), (98, 219880), (112, 192395), (115, 187376), (140, 153916), (161, 133840), (184, 117110), (196, 109940), (230, 93688), (239, 90160), (245, 87952), (280, 76958), (322, 66920), (368, 58555), (392, 54970), (460, 46844), (478, 45080), (490, 43976), (560, 38479), (644, 33460), (784, 27485), (805, 26768), (920, 23422), (956, 22540), (980, 21988), (1127, 19120), (1195, 18032), (1288, 16730), (1610, 13384), (1673, 12880), (1840, 11711), (1912, 11270), (1960, 10994), (2254, 9560), (2390, 9016), (2576, 8365), (3220, 6692), (3346, 6440), (3824, 5635), (3920, 5497), (4508, 4780)]