64978940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{491}}^1\times {\mathrm{509}}^1$

素因数の和:1022

約数の個数: 48

約数和(自身を含む): 147540960

約数和(自身を除く): 82562020

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 491, 509, 982, 1018, 1964, 2036, 2455, 2545, 4910, 5090, 6383, 6617, 9820, 10180, 12766, 13234, 25532, 26468, 31915, 33085, 63830, 66170, 127660, 132340, 249919, 499838, 999676, 1249595, 2499190, 3248947, 4998380, 6497894, 12995788, 16244735, 32489470, 64978940]

約数ペア:

[(1, 64978940), (2, 32489470), (4, 16244735), (5, 12995788), (10, 6497894), (13, 4998380), (20, 3248947), (26, 2499190), (52, 1249595), (65, 999676), (130, 499838), (260, 249919), (491, 132340), (509, 127660), (982, 66170), (1018, 63830), (1964, 33085), (2036, 31915), (2455, 26468), (2545, 25532), (4910, 13234), (5090, 12766), (6383, 10180), (6617, 9820)]