81981720

素因数分解:

$2^3\times 3^4\times 5^1\times {\mathrm{25303}}^1$

素因数の和:25326

約数の個数: 80

約数和(自身を含む): 275560560

約数和(自身を除く): 193578840

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 27, 30, 36, 40, 45, 54, 60, 72, 81, 90, 108, 120, 135, 162, 180, 216, 270, 324, 360, 405, 540, 648, 810, 1080, 1620, 3240, 25303, 50606, 75909, 101212, 126515, 151818, 202424, 227727, 253030, 303636, 379545, 455454, 506060, 607272, 683181, 759090, 910908, 1012120, 1138635, 1366362, 1518180, 1821816, 2049543, 2277270, 2732724, 3036360, 3415905, 4099086, 4554540, 5465448, 6831810, 8198172, 9109080, 10247715, 13663620, 16396344, 20495430, 27327240, 40990860, 81981720]

約数ペア:

[(1, 81981720), (2, 40990860), (3, 27327240), (4, 20495430), (5, 16396344), (6, 13663620), (8, 10247715), (9, 9109080), (10, 8198172), (12, 6831810), (15, 5465448), (18, 4554540), (20, 4099086), (24, 3415905), (27, 3036360), (30, 2732724), (36, 2277270), (40, 2049543), (45, 1821816), (54, 1518180), (60, 1366362), (72, 1138635), (81, 1012120), (90, 910908), (108, 759090), (120, 683181), (135, 607272), (162, 506060), (180, 455454), (216, 379545), (270, 303636), (324, 253030), (360, 227727), (405, 202424), (540, 151818), (648, 126515), (810, 101212), (1080, 75909), (1620, 50606), (3240, 25303)]