164865100

素因数分解:

$2^2\times 5^2\times {\mathrm{41}}^1\times {\mathrm{79}}^1\times {\mathrm{509}}^1$

素因数の和:643

約数の個数: 72

約数和(自身を含む): 371851200

約数和(自身を除く): 206986100

約数列:

[1, 2, 4, 5, 10, 20, 25, 41, 50, 79, 82, 100, 158, 164, 205, 316, 395, 410, 509, 790, 820, 1018, 1025, 1580, 1975, 2036, 2050, 2545, 3239, 3950, 4100, 5090, 6478, 7900, 10180, 12725, 12956, 16195, 20869, 25450, 32390, 40211, 41738, 50900, 64780, 80422, 80975, 83476, 104345, 160844, 161950, 201055, 208690, 323900, 402110, 417380, 521725, 804220, 1005275, 1043450, 1648651, 2010550, 2086900, 3297302, 4021100, 6594604, 8243255, 16486510, 32973020, 41216275, 82432550, 164865100]

約数ペア:

[(1, 164865100), (2, 82432550), (4, 41216275), (5, 32973020), (10, 16486510), (20, 8243255), (25, 6594604), (41, 4021100), (50, 3297302), (79, 2086900), (82, 2010550), (100, 1648651), (158, 1043450), (164, 1005275), (205, 804220), (316, 521725), (395, 417380), (410, 402110), (509, 323900), (790, 208690), (820, 201055), (1018, 161950), (1025, 160844), (1580, 104345), (1975, 83476), (2036, 80975), (2050, 80422), (2545, 64780), (3239, 50900), (3950, 41738), (4100, 40211), (5090, 32390), (6478, 25450), (7900, 20869), (10180, 16195), (12725, 12956)]