20942900

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{241}}^1$

素因数の和:345

約数の個数: 72

約数和(自身を含む): 50413440

約数和(自身を除く): 29470540

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 44, 50, 55, 79, 100, 110, 158, 220, 241, 275, 316, 395, 482, 550, 790, 869, 964, 1100, 1205, 1580, 1738, 1975, 2410, 2651, 3476, 3950, 4345, 4820, 5302, 6025, 7900, 8690, 10604, 12050, 13255, 17380, 19039, 21725, 24100, 26510, 38078, 43450, 53020, 66275, 76156, 86900, 95195, 132550, 190390, 209429, 265100, 380780, 418858, 475975, 837716, 951950, 1047145, 1903900, 2094290, 4188580, 5235725, 10471450, 20942900]

約数ペア:

[(1, 20942900), (2, 10471450), (4, 5235725), (5, 4188580), (10, 2094290), (11, 1903900), (20, 1047145), (22, 951950), (25, 837716), (44, 475975), (50, 418858), (55, 380780), (79, 265100), (100, 209429), (110, 190390), (158, 132550), (220, 95195), (241, 86900), (275, 76156), (316, 66275), (395, 53020), (482, 43450), (550, 38078), (790, 26510), (869, 24100), (964, 21725), (1100, 19039), (1205, 17380), (1580, 13255), (1738, 12050), (1975, 10604), (2410, 8690), (2651, 7900), (3476, 6025), (3950, 5302), (4345, 4820)]