81613420

素因数分解:

$2^2\times 5^1\times 7^3\times {\mathrm{11897}}^1$

素因数の和:11927

約数の個数: 48

約数和(自身を含む): 199886400

約数和(自身を除く): 118272980

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 343, 490, 686, 980, 1372, 1715, 3430, 6860, 11897, 23794, 47588, 59485, 83279, 118970, 166558, 237940, 333116, 416395, 582953, 832790, 1165906, 1665580, 2331812, 2914765, 4080671, 5829530, 8161342, 11659060, 16322684, 20403355, 40806710, 81613420]

約数ペア:

[(1, 81613420), (2, 40806710), (4, 20403355), (5, 16322684), (7, 11659060), (10, 8161342), (14, 5829530), (20, 4080671), (28, 2914765), (35, 2331812), (49, 1665580), (70, 1165906), (98, 832790), (140, 582953), (196, 416395), (245, 333116), (343, 237940), (490, 166558), (686, 118970), (980, 83279), (1372, 59485), (1715, 47588), (3430, 23794), (6860, 11897)]