20488910

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{127}}^1$

素因数の和:237

約数の個数: 64

約数和(自身を含む): 42964992

約数和(自身を除く): 22476082

約数列:

[1, 2, 5, 10, 13, 17, 26, 34, 65, 73, 85, 127, 130, 146, 170, 221, 254, 365, 442, 635, 730, 949, 1105, 1241, 1270, 1651, 1898, 2159, 2210, 2482, 3302, 4318, 4745, 6205, 8255, 9271, 9490, 10795, 12410, 16133, 16510, 18542, 21590, 28067, 32266, 46355, 56134, 80665, 92710, 120523, 140335, 157607, 161330, 241046, 280670, 315214, 602615, 788035, 1205230, 1576070, 2048891, 4097782, 10244455, 20488910]

約数ペア:

[(1, 20488910), (2, 10244455), (5, 4097782), (10, 2048891), (13, 1576070), (17, 1205230), (26, 788035), (34, 602615), (65, 315214), (73, 280670), (85, 241046), (127, 161330), (130, 157607), (146, 140335), (170, 120523), (221, 92710), (254, 80665), (365, 56134), (442, 46355), (635, 32266), (730, 28067), (949, 21590), (1105, 18542), (1241, 16510), (1270, 16133), (1651, 12410), (1898, 10795), (2159, 9490), (2210, 9271), (2482, 8255), (3302, 6205), (4318, 4745)]