80905240

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{991}}^1$

素因数の和:1172

約数の個数: 64

約数和(自身を含む): 197487360

約数和(自身を除く): 116582120

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 157, 260, 314, 520, 628, 785, 991, 1256, 1570, 1982, 2041, 3140, 3964, 4082, 4955, 6280, 7928, 8164, 9910, 10205, 12883, 16328, 19820, 20410, 25766, 39640, 40820, 51532, 64415, 81640, 103064, 128830, 155587, 257660, 311174, 515320, 622348, 777935, 1244696, 1555870, 2022631, 3111740, 4045262, 6223480, 8090524, 10113155, 16181048, 20226310, 40452620, 80905240]

約数ペア:

[(1, 80905240), (2, 40452620), (4, 20226310), (5, 16181048), (8, 10113155), (10, 8090524), (13, 6223480), (20, 4045262), (26, 3111740), (40, 2022631), (52, 1555870), (65, 1244696), (104, 777935), (130, 622348), (157, 515320), (260, 311174), (314, 257660), (520, 155587), (628, 128830), (785, 103064), (991, 81640), (1256, 64415), (1570, 51532), (1982, 40820), (2041, 39640), (3140, 25766), (3964, 20410), (4082, 19820), (4955, 16328), (6280, 12883), (7928, 10205), (8164, 9910)]