81813340

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{31}}^1\times {\mathrm{2693}}^1$

素因数の和:2747

約数の個数: 72

約数和(自身を含む): 206381952

約数和(自身を除く): 124568612

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, 2693, 3038, 4340, 5386, 6076, 7595, 10772, 13465, 15190, 18851, 26930, 30380, 37702, 53860, 75404, 83483, 94255, 131957, 166966, 188510, 263914, 333932, 377020, 417415, 527828, 584381, 659785, 834830, 1168762, 1319570, 1669660, 2337524, 2639140, 2921905, 4090667, 5843810, 8181334, 11687620, 16362668, 20453335, 40906670, 81813340]

約数ペア:

[(1, 81813340), (2, 40906670), (4, 20453335), (5, 16362668), (7, 11687620), (10, 8181334), (14, 5843810), (20, 4090667), (28, 2921905), (31, 2639140), (35, 2337524), (49, 1669660), (62, 1319570), (70, 1168762), (98, 834830), (124, 659785), (140, 584381), (155, 527828), (196, 417415), (217, 377020), (245, 333932), (310, 263914), (434, 188510), (490, 166966), (620, 131957), (868, 94255), (980, 83483), (1085, 75404), (1519, 53860), (2170, 37702), (2693, 30380), (3038, 26930), (4340, 18851), (5386, 15190), (6076, 13465), (7595, 10772)]