21581700

素因数分解:

$2^2\times 3^1\times 5^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{239}}^1$

素因数の和:306

約数の個数: 144

約数和(自身を含む): 73328640

約数和(自身を除く): 51746940

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 25, 28, 30, 35, 42, 43, 50, 60, 70, 75, 84, 86, 100, 105, 129, 140, 150, 172, 175, 210, 215, 239, 258, 300, 301, 350, 420, 430, 478, 516, 525, 602, 645, 700, 717, 860, 903, 956, 1050, 1075, 1195, 1204, 1290, 1434, 1505, 1673, 1806, 2100, 2150, 2390, 2580, 2868, 3010, 3225, 3346, 3585, 3612, 4300, 4515, 4780, 5019, 5975, 6020, 6450, 6692, 7170, 7525, 8365, 9030, 10038, 10277, 11950, 12900, 14340, 15050, 16730, 17925, 18060, 20076, 20554, 22575, 23900, 25095, 30100, 30831, 33460, 35850, 41108, 41825, 45150, 50190, 51385, 61662, 71700, 71939, 83650, 90300, 100380, 102770, 123324, 125475, 143878, 154155, 167300, 205540, 215817, 250950, 256925, 287756, 308310, 359695, 431634, 501900, 513850, 616620, 719390, 770775, 863268, 1027700, 1079085, 1438780, 1541550, 1798475, 2158170, 3083100, 3596950, 4316340, 5395425, 7193900, 10790850, 21581700]

約数ペア:

[(1, 21581700), (2, 10790850), (3, 7193900), (4, 5395425), (5, 4316340), (6, 3596950), (7, 3083100), (10, 2158170), (12, 1798475), (14, 1541550), (15, 1438780), (20, 1079085), (21, 1027700), (25, 863268), (28, 770775), (30, 719390), (35, 616620), (42, 513850), (43, 501900), (50, 431634), (60, 359695), (70, 308310), (75, 287756), (84, 256925), (86, 250950), (100, 215817), (105, 205540), (129, 167300), (140, 154155), (150, 143878), (172, 125475), (175, 123324), (210, 102770), (215, 100380), (239, 90300), (258, 83650), (300, 71939), (301, 71700), (350, 61662), (420, 51385), (430, 50190), (478, 45150), (516, 41825), (525, 41108), (602, 35850), (645, 33460), (700, 30831), (717, 30100), (860, 25095), (903, 23900), (956, 22575), (1050, 20554), (1075, 20076), (1195, 18060), (1204, 17925), (1290, 16730), (1434, 15050), (1505, 14340), (1673, 12900), (1806, 11950), (2100, 10277), (2150, 10038), (2390, 9030), (2580, 8365), (2868, 7525), (3010, 7170), (3225, 6692), (3346, 6450), (3585, 6020), (3612, 5975), (4300, 5019), (4515, 4780)]