20802093040

素因数分解:

$2^4\times 5^1\times {\mathrm{661}}^1\times {\mathrm{393383}}^1$

素因数の和:394057

約数の個数: 40

約数和(自身を含む): 48438158688

約数和(自身を除く): 27636065648

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 661, 1322, 2644, 3305, 5288, 6610, 10576, 13220, 26440, 52880, 393383, 786766, 1573532, 1966915, 3147064, 3933830, 6294128, 7867660, 15735320, 31470640, 260026163, 520052326, 1040104652, 1300130815, 2080209304, 2600261630, 4160418608, 5200523260, 10401046520, 20802093040]

約数ペア:

[(1, 20802093040), (2, 10401046520), (4, 5200523260), (5, 4160418608), (8, 2600261630), (10, 2080209304), (16, 1300130815), (20, 1040104652), (40, 520052326), (80, 260026163), (661, 31470640), (1322, 15735320), (2644, 7867660), (3305, 6294128), (5288, 3933830), (6610, 3147064), (10576, 1966915), (13220, 1573532), (26440, 786766), (52880, 393383)]