21400260

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{251}}^1$

素因数の和:306

約数の個数: 144

約数和(自身を含む): 72394560

約数和(自身を除く): 50994300

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 29, 30, 35, 42, 49, 58, 60, 70, 84, 87, 98, 105, 116, 140, 145, 147, 174, 196, 203, 210, 245, 251, 290, 294, 348, 406, 420, 435, 490, 502, 580, 588, 609, 735, 753, 812, 870, 980, 1004, 1015, 1218, 1255, 1421, 1470, 1506, 1740, 1757, 2030, 2436, 2510, 2842, 2940, 3012, 3045, 3514, 3765, 4060, 4263, 5020, 5271, 5684, 6090, 7028, 7105, 7279, 7530, 8526, 8785, 10542, 12180, 12299, 14210, 14558, 15060, 17052, 17570, 21084, 21315, 21837, 24598, 26355, 28420, 29116, 35140, 36395, 36897, 42630, 43674, 49196, 50953, 52710, 61495, 72790, 73794, 85260, 87348, 101906, 105420, 109185, 122990, 145580, 147588, 152859, 184485, 203812, 218370, 245980, 254765, 305718, 356671, 368970, 436740, 509530, 611436, 713342, 737940, 764295, 1019060, 1070013, 1426684, 1528590, 1783355, 2140026, 3057180, 3566710, 4280052, 5350065, 7133420, 10700130, 21400260]

約数ペア:

[(1, 21400260), (2, 10700130), (3, 7133420), (4, 5350065), (5, 4280052), (6, 3566710), (7, 3057180), (10, 2140026), (12, 1783355), (14, 1528590), (15, 1426684), (20, 1070013), (21, 1019060), (28, 764295), (29, 737940), (30, 713342), (35, 611436), (42, 509530), (49, 436740), (58, 368970), (60, 356671), (70, 305718), (84, 254765), (87, 245980), (98, 218370), (105, 203812), (116, 184485), (140, 152859), (145, 147588), (147, 145580), (174, 122990), (196, 109185), (203, 105420), (210, 101906), (245, 87348), (251, 85260), (290, 73794), (294, 72790), (348, 61495), (406, 52710), (420, 50953), (435, 49196), (490, 43674), (502, 42630), (580, 36897), (588, 36395), (609, 35140), (735, 29116), (753, 28420), (812, 26355), (870, 24598), (980, 21837), (1004, 21315), (1015, 21084), (1218, 17570), (1255, 17052), (1421, 15060), (1470, 14558), (1506, 14210), (1740, 12299), (1757, 12180), (2030, 10542), (2436, 8785), (2510, 8526), (2842, 7530), (2940, 7279), (3012, 7105), (3045, 7028), (3514, 6090), (3765, 5684), (4060, 5271), (4263, 5020)]