161225420

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{443}}^1\times {\mathrm{587}}^1$

素因数の和:1070

約数の個数: 48

約数和(自身を含む): 350880768

約数和(自身を除く): 189655348

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 443, 587, 620, 886, 1174, 1772, 2215, 2348, 2935, 4430, 5870, 8860, 11740, 13733, 18197, 27466, 36394, 54932, 68665, 72788, 90985, 137330, 181970, 260041, 274660, 363940, 520082, 1040164, 1300205, 2600410, 5200820, 8061271, 16122542, 32245084, 40306355, 80612710, 161225420]

約数ペア:

[(1, 161225420), (2, 80612710), (4, 40306355), (5, 32245084), (10, 16122542), (20, 8061271), (31, 5200820), (62, 2600410), (124, 1300205), (155, 1040164), (310, 520082), (443, 363940), (587, 274660), (620, 260041), (886, 181970), (1174, 137330), (1772, 90985), (2215, 72788), (2348, 68665), (2935, 54932), (4430, 36394), (5870, 27466), (8860, 18197), (11740, 13733)]