21029680

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{47}}^2$

素因数の和:131

約数の個数: 120

約数和(自身を含む): 60451488

約数和(自身を除く): 39421808

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 17, 20, 28, 34, 35, 40, 47, 56, 68, 70, 80, 85, 94, 112, 119, 136, 140, 170, 188, 235, 238, 272, 280, 329, 340, 376, 470, 476, 560, 595, 658, 680, 752, 799, 940, 952, 1190, 1316, 1360, 1598, 1645, 1880, 1904, 2209, 2380, 2632, 3196, 3290, 3760, 3995, 4418, 4760, 5264, 5593, 6392, 6580, 7990, 8836, 9520, 11045, 11186, 12784, 13160, 15463, 15980, 17672, 22090, 22372, 26320, 27965, 30926, 31960, 35344, 37553, 44180, 44744, 55930, 61852, 63920, 75106, 77315, 88360, 89488, 111860, 123704, 150212, 154630, 176720, 187765, 223720, 247408, 262871, 300424, 309260, 375530, 447440, 525742, 600848, 618520, 751060, 1051484, 1237040, 1314355, 1502120, 2102968, 2628710, 3004240, 4205936, 5257420, 10514840, 21029680]

約数ペア:

[(1, 21029680), (2, 10514840), (4, 5257420), (5, 4205936), (7, 3004240), (8, 2628710), (10, 2102968), (14, 1502120), (16, 1314355), (17, 1237040), (20, 1051484), (28, 751060), (34, 618520), (35, 600848), (40, 525742), (47, 447440), (56, 375530), (68, 309260), (70, 300424), (80, 262871), (85, 247408), (94, 223720), (112, 187765), (119, 176720), (136, 154630), (140, 150212), (170, 123704), (188, 111860), (235, 89488), (238, 88360), (272, 77315), (280, 75106), (329, 63920), (340, 61852), (376, 55930), (470, 44744), (476, 44180), (560, 37553), (595, 35344), (658, 31960), (680, 30926), (752, 27965), (799, 26320), (940, 22372), (952, 22090), (1190, 17672), (1316, 15980), (1360, 15463), (1598, 13160), (1645, 12784), (1880, 11186), (1904, 11045), (2209, 9520), (2380, 8836), (2632, 7990), (3196, 6580), (3290, 6392), (3760, 5593), (3995, 5264), (4418, 4760)]