20907705

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{53}}^1$

素因数の和:115

約数の個数: 96

約数和(自身を含む): 44561664

約数和(自身を除く): 23653959

約数列:

[1, 3, 5, 7, 13, 15, 17, 21, 35, 39, 51, 53, 65, 85, 91, 105, 119, 159, 195, 221, 255, 265, 273, 289, 357, 371, 455, 595, 663, 689, 795, 867, 901, 1105, 1113, 1365, 1445, 1547, 1785, 1855, 2023, 2067, 2703, 3315, 3445, 3757, 4335, 4505, 4641, 4823, 5565, 6069, 6307, 7735, 10115, 10335, 11271, 11713, 13515, 14469, 15317, 18785, 18921, 23205, 24115, 26299, 30345, 31535, 35139, 45951, 56355, 58565, 72345, 76585, 78897, 81991, 94605, 107219, 131495, 175695, 199121, 229755, 245973, 321657, 394485, 409955, 536095, 597363, 995605, 1229865, 1393847, 1608285, 2986815, 4181541, 6969235, 20907705]

約数ペア:

[(1, 20907705), (3, 6969235), (5, 4181541), (7, 2986815), (13, 1608285), (15, 1393847), (17, 1229865), (21, 995605), (35, 597363), (39, 536095), (51, 409955), (53, 394485), (65, 321657), (85, 245973), (91, 229755), (105, 199121), (119, 175695), (159, 131495), (195, 107219), (221, 94605), (255, 81991), (265, 78897), (273, 76585), (289, 72345), (357, 58565), (371, 56355), (455, 45951), (595, 35139), (663, 31535), (689, 30345), (795, 26299), (867, 24115), (901, 23205), (1105, 18921), (1113, 18785), (1365, 15317), (1445, 14469), (1547, 13515), (1785, 11713), (1855, 11271), (2023, 10335), (2067, 10115), (2703, 7735), (3315, 6307), (3445, 6069), (3757, 5565), (4335, 4823), (4505, 4641)]