81777320

素因数分解:

$2^3\times 5^1\times {\mathrm{991}}^1\times {\mathrm{2063}}^1$

素因数の和:3065

約数の個数: 32

約数和(自身を含む): 184273920

約数和(自身を除く): 102496600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 991, 1982, 2063, 3964, 4126, 4955, 7928, 8252, 9910, 10315, 16504, 19820, 20630, 39640, 41260, 82520, 2044433, 4088866, 8177732, 10222165, 16355464, 20444330, 40888660, 81777320]

約数ペア:

[(1, 81777320), (2, 40888660), (4, 20444330), (5, 16355464), (8, 10222165), (10, 8177732), (20, 4088866), (40, 2044433), (991, 82520), (1982, 41260), (2063, 39640), (3964, 20630), (4126, 19820), (4955, 16504), (7928, 10315), (8252, 9910)]