21285180

素因数分解:

$2^2\times 3^4\times 5^1\times 7^1\times {\mathrm{1877}}^1$

素因数の和:1905

約数の個数: 120

約数和(自身を含む): 76351968

約数和(自身を除く): 55066788

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 27, 28, 30, 35, 36, 42, 45, 54, 60, 63, 70, 81, 84, 90, 105, 108, 126, 135, 140, 162, 180, 189, 210, 252, 270, 315, 324, 378, 405, 420, 540, 567, 630, 756, 810, 945, 1134, 1260, 1620, 1877, 1890, 2268, 2835, 3754, 3780, 5631, 5670, 7508, 9385, 11262, 11340, 13139, 16893, 18770, 22524, 26278, 28155, 33786, 37540, 39417, 50679, 52556, 56310, 65695, 67572, 78834, 84465, 101358, 112620, 118251, 131390, 152037, 157668, 168930, 197085, 202716, 236502, 253395, 262780, 304074, 337860, 354753, 394170, 473004, 506790, 591255, 608148, 709506, 760185, 788340, 1013580, 1064259, 1182510, 1419012, 1520370, 1773765, 2128518, 2365020, 3040740, 3547530, 4257036, 5321295, 7095060, 10642590, 21285180]

約数ペア:

[(1, 21285180), (2, 10642590), (3, 7095060), (4, 5321295), (5, 4257036), (6, 3547530), (7, 3040740), (9, 2365020), (10, 2128518), (12, 1773765), (14, 1520370), (15, 1419012), (18, 1182510), (20, 1064259), (21, 1013580), (27, 788340), (28, 760185), (30, 709506), (35, 608148), (36, 591255), (42, 506790), (45, 473004), (54, 394170), (60, 354753), (63, 337860), (70, 304074), (81, 262780), (84, 253395), (90, 236502), (105, 202716), (108, 197085), (126, 168930), (135, 157668), (140, 152037), (162, 131390), (180, 118251), (189, 112620), (210, 101358), (252, 84465), (270, 78834), (315, 67572), (324, 65695), (378, 56310), (405, 52556), (420, 50679), (540, 39417), (567, 37540), (630, 33786), (756, 28155), (810, 26278), (945, 22524), (1134, 18770), (1260, 16893), (1620, 13139), (1877, 11340), (1890, 11262), (2268, 9385), (2835, 7508), (3754, 5670), (3780, 5631)]