21018400

素因数分解:

$2^5\times 5^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1$

素因数の和:123

約数の個数: 144

約数和(自身を含む): 57746304

約数和(自身を除く): 36727904

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 32, 40, 43, 47, 50, 52, 65, 80, 86, 94, 100, 104, 130, 160, 172, 188, 200, 208, 215, 235, 260, 325, 344, 376, 400, 416, 430, 470, 520, 559, 611, 650, 688, 752, 800, 860, 940, 1040, 1075, 1118, 1175, 1222, 1300, 1376, 1504, 1720, 1880, 2021, 2080, 2150, 2236, 2350, 2444, 2600, 2795, 3055, 3440, 3760, 4042, 4300, 4472, 4700, 4888, 5200, 5590, 6110, 6880, 7520, 8084, 8600, 8944, 9400, 9776, 10105, 10400, 11180, 12220, 13975, 15275, 16168, 17200, 17888, 18800, 19552, 20210, 22360, 24440, 26273, 27950, 30550, 32336, 34400, 37600, 40420, 44720, 48880, 50525, 52546, 55900, 61100, 64672, 80840, 89440, 97760, 101050, 105092, 111800, 122200, 131365, 161680, 202100, 210184, 223600, 244400, 262730, 323360, 404200, 420368, 447200, 488800, 525460, 656825, 808400, 840736, 1050920, 1313650, 1616800, 2101840, 2627300, 4203680, 5254600, 10509200, 21018400]

約数ペア:

[(1, 21018400), (2, 10509200), (4, 5254600), (5, 4203680), (8, 2627300), (10, 2101840), (13, 1616800), (16, 1313650), (20, 1050920), (25, 840736), (26, 808400), (32, 656825), (40, 525460), (43, 488800), (47, 447200), (50, 420368), (52, 404200), (65, 323360), (80, 262730), (86, 244400), (94, 223600), (100, 210184), (104, 202100), (130, 161680), (160, 131365), (172, 122200), (188, 111800), (200, 105092), (208, 101050), (215, 97760), (235, 89440), (260, 80840), (325, 64672), (344, 61100), (376, 55900), (400, 52546), (416, 50525), (430, 48880), (470, 44720), (520, 40420), (559, 37600), (611, 34400), (650, 32336), (688, 30550), (752, 27950), (800, 26273), (860, 24440), (940, 22360), (1040, 20210), (1075, 19552), (1118, 18800), (1175, 17888), (1222, 17200), (1300, 16168), (1376, 15275), (1504, 13975), (1720, 12220), (1880, 11180), (2021, 10400), (2080, 10105), (2150, 9776), (2236, 9400), (2350, 8944), (2444, 8600), (2600, 8084), (2795, 7520), (3055, 6880), (3440, 6110), (3760, 5590), (4042, 5200), (4300, 4888), (4472, 4700)]