21135420

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{6907}}^1$

素因数の和:6939

約数の個数: 72

約数和(自身を含む): 67891824

約数和(自身を除く): 46756404

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 17, 18, 20, 30, 34, 36, 45, 51, 60, 68, 85, 90, 102, 153, 170, 180, 204, 255, 306, 340, 510, 612, 765, 1020, 1530, 3060, 6907, 13814, 20721, 27628, 34535, 41442, 62163, 69070, 82884, 103605, 117419, 124326, 138140, 207210, 234838, 248652, 310815, 352257, 414420, 469676, 587095, 621630, 704514, 1056771, 1174190, 1243260, 1409028, 1761285, 2113542, 2348380, 3522570, 4227084, 5283855, 7045140, 10567710, 21135420]

約数ペア:

[(1, 21135420), (2, 10567710), (3, 7045140), (4, 5283855), (5, 4227084), (6, 3522570), (9, 2348380), (10, 2113542), (12, 1761285), (15, 1409028), (17, 1243260), (18, 1174190), (20, 1056771), (30, 704514), (34, 621630), (36, 587095), (45, 469676), (51, 414420), (60, 352257), (68, 310815), (85, 248652), (90, 234838), (102, 207210), (153, 138140), (170, 124326), (180, 117419), (204, 103605), (255, 82884), (306, 69070), (340, 62163), (510, 41442), (612, 34535), (765, 27628), (1020, 20721), (1530, 13814), (3060, 6907)]