21005850

素因数分解:

$2^1\times 3^1\times 5^2\times {\mathrm{131}}^1\times {\mathrm{1069}}^1$

素因数の和:1215

約数の個数: 48

約数和(自身を含む): 52541280

約数和(自身を除く): 31535430

約数列:

[1, 2, 3, 5, 6, 10, 15, 25, 30, 50, 75, 131, 150, 262, 393, 655, 786, 1069, 1310, 1965, 2138, 3207, 3275, 3930, 5345, 6414, 6550, 9825, 10690, 16035, 19650, 26725, 32070, 53450, 80175, 140039, 160350, 280078, 420117, 700195, 840234, 1400390, 2100585, 3500975, 4201170, 7001950, 10502925, 21005850]

約数ペア:

[(1, 21005850), (2, 10502925), (3, 7001950), (5, 4201170), (6, 3500975), (10, 2100585), (15, 1400390), (25, 840234), (30, 700195), (50, 420117), (75, 280078), (131, 160350), (150, 140039), (262, 80175), (393, 53450), (655, 32070), (786, 26725), (1069, 19650), (1310, 16035), (1965, 10690), (2138, 9825), (3207, 6550), (3275, 6414), (3930, 5345)]