81441560

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{229}}^1\times {\mathrm{523}}^1$

素因数の和:780

約数の個数: 64

約数和(自身を含む): 195242400

約数和(自身を除く): 113800840

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 229, 340, 458, 523, 680, 916, 1046, 1145, 1832, 2092, 2290, 2615, 3893, 4184, 4580, 5230, 7786, 8891, 9160, 10460, 15572, 17782, 19465, 20920, 31144, 35564, 38930, 44455, 71128, 77860, 88910, 119767, 155720, 177820, 239534, 355640, 479068, 598835, 958136, 1197670, 2036039, 2395340, 4072078, 4790680, 8144156, 10180195, 16288312, 20360390, 40720780, 81441560]

約数ペア:

[(1, 81441560), (2, 40720780), (4, 20360390), (5, 16288312), (8, 10180195), (10, 8144156), (17, 4790680), (20, 4072078), (34, 2395340), (40, 2036039), (68, 1197670), (85, 958136), (136, 598835), (170, 479068), (229, 355640), (340, 239534), (458, 177820), (523, 155720), (680, 119767), (916, 88910), (1046, 77860), (1145, 71128), (1832, 44455), (2092, 38930), (2290, 35564), (2615, 31144), (3893, 20920), (4184, 19465), (4580, 17782), (5230, 15572), (7786, 10460), (8891, 9160)]