21087225

素因数分解:

$3^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{149}}^1$

素因数の和:219

約数の個数: 72

約数和(自身を含む): 41347800

約数和(自身を除く): 20260575

約数列:

[1, 3, 5, 9, 15, 17, 25, 37, 45, 51, 75, 85, 111, 149, 153, 185, 225, 255, 333, 425, 447, 555, 629, 745, 765, 925, 1275, 1341, 1665, 1887, 2235, 2533, 2775, 3145, 3725, 3825, 5513, 5661, 6705, 7599, 8325, 9435, 11175, 12665, 15725, 16539, 22797, 27565, 28305, 33525, 37995, 47175, 49617, 63325, 82695, 93721, 113985, 137825, 141525, 189975, 248085, 281163, 413475, 468605, 569925, 843489, 1240425, 1405815, 2343025, 4217445, 7029075, 21087225]

約数ペア:

[(1, 21087225), (3, 7029075), (5, 4217445), (9, 2343025), (15, 1405815), (17, 1240425), (25, 843489), (37, 569925), (45, 468605), (51, 413475), (75, 281163), (85, 248085), (111, 189975), (149, 141525), (153, 137825), (185, 113985), (225, 93721), (255, 82695), (333, 63325), (425, 49617), (447, 47175), (555, 37995), (629, 33525), (745, 28305), (765, 27565), (925, 22797), (1275, 16539), (1341, 15725), (1665, 12665), (1887, 11175), (2235, 9435), (2533, 8325), (2775, 7599), (3145, 6705), (3725, 5661), (3825, 5513)]