81709240

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{70439}}^1$

素因数の和:70479

約数の個数: 32

約数和(自身を含む): 190188000

約数和(自身を除く): 108478760

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 116, 145, 232, 290, 580, 1160, 70439, 140878, 281756, 352195, 563512, 704390, 1408780, 2042731, 2817560, 4085462, 8170924, 10213655, 16341848, 20427310, 40854620, 81709240]

約数ペア:

[(1, 81709240), (2, 40854620), (4, 20427310), (5, 16341848), (8, 10213655), (10, 8170924), (20, 4085462), (29, 2817560), (40, 2042731), (58, 1408780), (116, 704390), (145, 563512), (232, 352195), (290, 281756), (580, 140878), (1160, 70439)]