21635740

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{73}}^2$

素因数の和:191

約数の個数: 72

約数和(自身を含む): 54462240

約数和(自身を除く): 32826500

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 29, 35, 58, 70, 73, 116, 140, 145, 146, 203, 290, 292, 365, 406, 511, 580, 730, 812, 1015, 1022, 1460, 2030, 2044, 2117, 2555, 4060, 4234, 5110, 5329, 8468, 10220, 10585, 10658, 14819, 21170, 21316, 26645, 29638, 37303, 42340, 53290, 59276, 74095, 74606, 106580, 148190, 149212, 154541, 186515, 296380, 309082, 373030, 618164, 746060, 772705, 1081787, 1545410, 2163574, 3090820, 4327148, 5408935, 10817870, 21635740]

約数ペア:

[(1, 21635740), (2, 10817870), (4, 5408935), (5, 4327148), (7, 3090820), (10, 2163574), (14, 1545410), (20, 1081787), (28, 772705), (29, 746060), (35, 618164), (58, 373030), (70, 309082), (73, 296380), (116, 186515), (140, 154541), (145, 149212), (146, 148190), (203, 106580), (290, 74606), (292, 74095), (365, 59276), (406, 53290), (511, 42340), (580, 37303), (730, 29638), (812, 26645), (1015, 21316), (1022, 21170), (1460, 14819), (2030, 10658), (2044, 10585), (2117, 10220), (2555, 8468), (4060, 5329), (4234, 5110)]