20814885

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{23}}^1$

素因数の和:84

約数の個数: 144

約数和(自身を含む): 49330944

約数和(自身を除く): 28516059

約数列:

[1, 3, 5, 7, 9, 13, 15, 17, 21, 23, 35, 39, 45, 51, 63, 65, 69, 85, 91, 105, 115, 117, 119, 153, 161, 169, 195, 207, 221, 255, 273, 299, 315, 345, 357, 391, 455, 483, 507, 585, 595, 663, 765, 805, 819, 845, 897, 1035, 1071, 1105, 1173, 1183, 1365, 1449, 1495, 1521, 1547, 1785, 1955, 1989, 2093, 2415, 2535, 2691, 2737, 2873, 3315, 3519, 3549, 3887, 4095, 4485, 4641, 5083, 5355, 5865, 5915, 6279, 7245, 7605, 7735, 8211, 8619, 9945, 10465, 10647, 11661, 13455, 13685, 13923, 14365, 15249, 17595, 17745, 18837, 19435, 20111, 23205, 24633, 25415, 25857, 27209, 31395, 34983, 35581, 41055, 43095, 45747, 53235, 58305, 60333, 66079, 69615, 76245, 81627, 94185, 100555, 106743, 123165, 129285, 136045, 174915, 177905, 180999, 198237, 228735, 244881, 301665, 320229, 330395, 408135, 462553, 533715, 594711, 904995, 991185, 1224405, 1387659, 1601145, 2312765, 2973555, 4162977, 6938295, 20814885]

約数ペア:

[(1, 20814885), (3, 6938295), (5, 4162977), (7, 2973555), (9, 2312765), (13, 1601145), (15, 1387659), (17, 1224405), (21, 991185), (23, 904995), (35, 594711), (39, 533715), (45, 462553), (51, 408135), (63, 330395), (65, 320229), (69, 301665), (85, 244881), (91, 228735), (105, 198237), (115, 180999), (117, 177905), (119, 174915), (153, 136045), (161, 129285), (169, 123165), (195, 106743), (207, 100555), (221, 94185), (255, 81627), (273, 76245), (299, 69615), (315, 66079), (345, 60333), (357, 58305), (391, 53235), (455, 45747), (483, 43095), (507, 41055), (585, 35581), (595, 34983), (663, 31395), (765, 27209), (805, 25857), (819, 25415), (845, 24633), (897, 23205), (1035, 20111), (1071, 19435), (1105, 18837), (1173, 17745), (1183, 17595), (1365, 15249), (1449, 14365), (1495, 13923), (1521, 13685), (1547, 13455), (1785, 11661), (1955, 10647), (1989, 10465), (2093, 9945), (2415, 8619), (2535, 8211), (2691, 7735), (2737, 7605), (2873, 7245), (3315, 6279), (3519, 5915), (3549, 5865), (3887, 5355), (4095, 5083), (4485, 4641)]