81625180

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{149}}^1$

素因数の和:228

約数の個数: 144

約数和(自身を含む): 221205600

約数和(自身を除く): 139580420

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 43, 49, 52, 65, 70, 86, 91, 98, 130, 140, 149, 172, 182, 196, 215, 245, 260, 298, 301, 364, 430, 455, 490, 559, 596, 602, 637, 745, 860, 910, 980, 1043, 1118, 1204, 1274, 1490, 1505, 1820, 1937, 2086, 2107, 2236, 2548, 2795, 2980, 3010, 3185, 3874, 3913, 4172, 4214, 5215, 5590, 6020, 6370, 6407, 7301, 7748, 7826, 8428, 9685, 10430, 10535, 11180, 12740, 12814, 13559, 14602, 15652, 19370, 19565, 20860, 21070, 25628, 27118, 27391, 29204, 32035, 36505, 38740, 39130, 42140, 44849, 54236, 54782, 64070, 67795, 73010, 78260, 83291, 89698, 94913, 109564, 128140, 135590, 136955, 146020, 166582, 179396, 189826, 224245, 271180, 273910, 313943, 333164, 379652, 416455, 448490, 474565, 547820, 583037, 627886, 832910, 896980, 949130, 1166074, 1255772, 1569715, 1665820, 1898260, 2332148, 2915185, 3139430, 4081259, 5830370, 6278860, 8162518, 11660740, 16325036, 20406295, 40812590, 81625180]

約数ペア:

[(1, 81625180), (2, 40812590), (4, 20406295), (5, 16325036), (7, 11660740), (10, 8162518), (13, 6278860), (14, 5830370), (20, 4081259), (26, 3139430), (28, 2915185), (35, 2332148), (43, 1898260), (49, 1665820), (52, 1569715), (65, 1255772), (70, 1166074), (86, 949130), (91, 896980), (98, 832910), (130, 627886), (140, 583037), (149, 547820), (172, 474565), (182, 448490), (196, 416455), (215, 379652), (245, 333164), (260, 313943), (298, 273910), (301, 271180), (364, 224245), (430, 189826), (455, 179396), (490, 166582), (559, 146020), (596, 136955), (602, 135590), (637, 128140), (745, 109564), (860, 94913), (910, 89698), (980, 83291), (1043, 78260), (1118, 73010), (1204, 67795), (1274, 64070), (1490, 54782), (1505, 54236), (1820, 44849), (1937, 42140), (2086, 39130), (2107, 38740), (2236, 36505), (2548, 32035), (2795, 29204), (2980, 27391), (3010, 27118), (3185, 25628), (3874, 21070), (3913, 20860), (4172, 19565), (4214, 19370), (5215, 15652), (5590, 14602), (6020, 13559), (6370, 12814), (6407, 12740), (7301, 11180), (7748, 10535), (7826, 10430), (8428, 9685)]