21118440

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{811}}^1$

素因数の和:863

約数の個数: 128

約数和(自身を含む): 74833920

約数和(自身を除く): 53715480

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 31, 35, 40, 42, 56, 60, 62, 70, 84, 93, 105, 120, 124, 140, 155, 168, 186, 210, 217, 248, 280, 310, 372, 420, 434, 465, 620, 651, 744, 811, 840, 868, 930, 1085, 1240, 1302, 1622, 1736, 1860, 2170, 2433, 2604, 3244, 3255, 3720, 4055, 4340, 4866, 5208, 5677, 6488, 6510, 8110, 8680, 9732, 11354, 12165, 13020, 16220, 17031, 19464, 22708, 24330, 25141, 26040, 28385, 32440, 34062, 45416, 48660, 50282, 56770, 68124, 75423, 85155, 97320, 100564, 113540, 125705, 136248, 150846, 170310, 175987, 201128, 227080, 251410, 301692, 340620, 351974, 377115, 502820, 527961, 603384, 681240, 703948, 754230, 879935, 1005640, 1055922, 1407896, 1508460, 1759870, 2111844, 2639805, 3016920, 3519740, 4223688, 5279610, 7039480, 10559220, 21118440]

約数ペア:

[(1, 21118440), (2, 10559220), (3, 7039480), (4, 5279610), (5, 4223688), (6, 3519740), (7, 3016920), (8, 2639805), (10, 2111844), (12, 1759870), (14, 1508460), (15, 1407896), (20, 1055922), (21, 1005640), (24, 879935), (28, 754230), (30, 703948), (31, 681240), (35, 603384), (40, 527961), (42, 502820), (56, 377115), (60, 351974), (62, 340620), (70, 301692), (84, 251410), (93, 227080), (105, 201128), (120, 175987), (124, 170310), (140, 150846), (155, 136248), (168, 125705), (186, 113540), (210, 100564), (217, 97320), (248, 85155), (280, 75423), (310, 68124), (372, 56770), (420, 50282), (434, 48660), (465, 45416), (620, 34062), (651, 32440), (744, 28385), (811, 26040), (840, 25141), (868, 24330), (930, 22708), (1085, 19464), (1240, 17031), (1302, 16220), (1622, 13020), (1736, 12165), (1860, 11354), (2170, 9732), (2433, 8680), (2604, 8110), (3244, 6510), (3255, 6488), (3720, 5677), (4055, 5208), (4340, 4866)]