21180900

素因数分解:

$2^2\times 3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{5431}}^1$

素因数の和:5461

約数の個数: 72

約数和(自身を含む): 66009664

約数和(自身を除く): 44828764

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 25, 26, 30, 39, 50, 52, 60, 65, 75, 78, 100, 130, 150, 156, 195, 260, 300, 325, 390, 650, 780, 975, 1300, 1950, 3900, 5431, 10862, 16293, 21724, 27155, 32586, 54310, 65172, 70603, 81465, 108620, 135775, 141206, 162930, 211809, 271550, 282412, 325860, 353015, 407325, 423618, 543100, 706030, 814650, 847236, 1059045, 1412060, 1629300, 1765075, 2118090, 3530150, 4236180, 5295225, 7060300, 10590450, 21180900]

約数ペア:

[(1, 21180900), (2, 10590450), (3, 7060300), (4, 5295225), (5, 4236180), (6, 3530150), (10, 2118090), (12, 1765075), (13, 1629300), (15, 1412060), (20, 1059045), (25, 847236), (26, 814650), (30, 706030), (39, 543100), (50, 423618), (52, 407325), (60, 353015), (65, 325860), (75, 282412), (78, 271550), (100, 211809), (130, 162930), (150, 141206), (156, 135775), (195, 108620), (260, 81465), (300, 70603), (325, 65172), (390, 54310), (650, 32586), (780, 27155), (975, 21724), (1300, 16293), (1950, 10862), (3900, 5431)]