21189420

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{67}}^1\times {\mathrm{251}}^1$

素因数の和:340

約数の個数: 144

約数和(自身を含む): 74850048

約数和(自身を除く): 53660628

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 67, 70, 84, 90, 105, 126, 134, 140, 180, 201, 210, 251, 252, 268, 315, 335, 402, 420, 469, 502, 603, 630, 670, 753, 804, 938, 1004, 1005, 1206, 1255, 1260, 1340, 1407, 1506, 1757, 1876, 2010, 2259, 2345, 2412, 2510, 2814, 3012, 3015, 3514, 3765, 4020, 4221, 4518, 4690, 5020, 5271, 5628, 6030, 7028, 7035, 7530, 8442, 8785, 9036, 9380, 10542, 11295, 12060, 14070, 15060, 15813, 16817, 16884, 17570, 21084, 21105, 22590, 26355, 28140, 31626, 33634, 35140, 42210, 45180, 50451, 52710, 63252, 67268, 79065, 84085, 84420, 100902, 105420, 117719, 151353, 158130, 168170, 201804, 235438, 252255, 302706, 316260, 336340, 353157, 470876, 504510, 588595, 605412, 706314, 756765, 1009020, 1059471, 1177190, 1412628, 1513530, 1765785, 2118942, 2354380, 3027060, 3531570, 4237884, 5297355, 7063140, 10594710, 21189420]

約数ペア:

[(1, 21189420), (2, 10594710), (3, 7063140), (4, 5297355), (5, 4237884), (6, 3531570), (7, 3027060), (9, 2354380), (10, 2118942), (12, 1765785), (14, 1513530), (15, 1412628), (18, 1177190), (20, 1059471), (21, 1009020), (28, 756765), (30, 706314), (35, 605412), (36, 588595), (42, 504510), (45, 470876), (60, 353157), (63, 336340), (67, 316260), (70, 302706), (84, 252255), (90, 235438), (105, 201804), (126, 168170), (134, 158130), (140, 151353), (180, 117719), (201, 105420), (210, 100902), (251, 84420), (252, 84085), (268, 79065), (315, 67268), (335, 63252), (402, 52710), (420, 50451), (469, 45180), (502, 42210), (603, 35140), (630, 33634), (670, 31626), (753, 28140), (804, 26355), (938, 22590), (1004, 21105), (1005, 21084), (1206, 17570), (1255, 16884), (1260, 16817), (1340, 15813), (1407, 15060), (1506, 14070), (1757, 12060), (1876, 11295), (2010, 10542), (2259, 9380), (2345, 9036), (2412, 8785), (2510, 8442), (2814, 7530), (3012, 7035), (3015, 7028), (3514, 6030), (3765, 5628), (4020, 5271), (4221, 5020), (4518, 4690)]