21478140

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{7019}}^1$

素因数の和:7051

約数の個数: 72

約数和(自身を含む): 68992560

約数和(自身を除く): 47514420

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, 7019, 14038, 21057, 28076, 35095, 42114, 63171, 70190, 84228, 105285, 119323, 126342, 140380, 210570, 238646, 252684, 315855, 357969, 421140, 477292, 596615, 631710, 715938, 1073907, 1193230, 1263420, 1431876, 1789845, 2147814, 2386460, 3579690, 4295628, 5369535, 7159380, 10739070, 21478140]

約数ペア:

[(1, 21478140), (2, 10739070), (3, 7159380), (4, 5369535), (5, 4295628), (6, 3579690), (9, 2386460), (10, 2147814), (12, 1789845), (15, 1431876), (17, 1263420), (18, 1193230), (20, 1073907), (30, 715938), (34, 631710), (36, 596615), (45, 477292), (51, 421140), (60, 357969), (68, 315855), (85, 252684), (90, 238646), (102, 210570), (153, 140380), (170, 126342), (180, 119323), (204, 105285), (255, 84228), (306, 70190), (340, 63171), (510, 42114), (612, 35095), (765, 28076), (1020, 21057), (1530, 14038), (3060, 7019)]