81234140

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{397}}^1\times {\mathrm{787}}^1$

素因数の和:1206

約数の個数: 48

約数和(自身を含む): 184410912

約数和(自身を除く): 103176772

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 397, 787, 794, 1574, 1588, 1985, 3148, 3935, 3970, 5161, 7870, 7940, 10231, 10322, 15740, 20462, 20644, 25805, 40924, 51155, 51610, 102310, 103220, 204620, 312439, 624878, 1249756, 1562195, 3124390, 4061707, 6248780, 8123414, 16246828, 20308535, 40617070, 81234140]

約数ペア:

[(1, 81234140), (2, 40617070), (4, 20308535), (5, 16246828), (10, 8123414), (13, 6248780), (20, 4061707), (26, 3124390), (52, 1562195), (65, 1249756), (130, 624878), (260, 312439), (397, 204620), (787, 103220), (794, 102310), (1574, 51610), (1588, 51155), (1985, 40924), (3148, 25805), (3935, 20644), (3970, 20462), (5161, 15740), (7870, 10322), (7940, 10231)]