81509540

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{31}}^1\times {\mathrm{2683}}^1$

素因数の和:2737

約数の個数: 72

約数和(自身を含む): 205615872

約数和(自身を除く): 124106332

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 31, 35, 49, 62, 70, 98, 124, 140, 155, 196, 217, 245, 310, 434, 490, 620, 868, 980, 1085, 1519, 2170, 2683, 3038, 4340, 5366, 6076, 7595, 10732, 13415, 15190, 18781, 26830, 30380, 37562, 53660, 75124, 83173, 93905, 131467, 166346, 187810, 262934, 332692, 375620, 415865, 525868, 582211, 657335, 831730, 1164422, 1314670, 1663460, 2328844, 2629340, 2911055, 4075477, 5822110, 8150954, 11644220, 16301908, 20377385, 40754770, 81509540]

約数ペア:

[(1, 81509540), (2, 40754770), (4, 20377385), (5, 16301908), (7, 11644220), (10, 8150954), (14, 5822110), (20, 4075477), (28, 2911055), (31, 2629340), (35, 2328844), (49, 1663460), (62, 1314670), (70, 1164422), (98, 831730), (124, 657335), (140, 582211), (155, 525868), (196, 415865), (217, 375620), (245, 332692), (310, 262934), (434, 187810), (490, 166346), (620, 131467), (868, 93905), (980, 83173), (1085, 75124), (1519, 53660), (2170, 37562), (2683, 30380), (3038, 26830), (4340, 18781), (5366, 15190), (6076, 13415), (7595, 10732)]