19904680

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{53}}^1\times {\mathrm{229}}^1$

素因数の和:334

約数の個数: 64

約数和(自身を含む): 46947600

約数和(自身を除く): 27042920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 53, 82, 106, 164, 205, 212, 229, 265, 328, 410, 424, 458, 530, 820, 916, 1060, 1145, 1640, 1832, 2120, 2173, 2290, 4346, 4580, 8692, 9160, 9389, 10865, 12137, 17384, 18778, 21730, 24274, 37556, 43460, 46945, 48548, 60685, 75112, 86920, 93890, 97096, 121370, 187780, 242740, 375560, 485480, 497617, 995234, 1990468, 2488085, 3980936, 4976170, 9952340, 19904680]

約数ペア:

[(1, 19904680), (2, 9952340), (4, 4976170), (5, 3980936), (8, 2488085), (10, 1990468), (20, 995234), (40, 497617), (41, 485480), (53, 375560), (82, 242740), (106, 187780), (164, 121370), (205, 97096), (212, 93890), (229, 86920), (265, 75112), (328, 60685), (410, 48548), (424, 46945), (458, 43460), (530, 37556), (820, 24274), (916, 21730), (1060, 18778), (1145, 17384), (1640, 12137), (1832, 10865), (2120, 9389), (2173, 9160), (2290, 8692), (4346, 4580)]