21562380

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{157}}^1$

素因数の和:288

約数の個数: 144

約数和(自身を含む): 75915840

約数和(自身を除く): 54353460

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, 70, 84, 90, 105, 109, 126, 140, 157, 180, 210, 218, 252, 314, 315, 327, 420, 436, 471, 545, 628, 630, 654, 763, 785, 942, 981, 1090, 1099, 1260, 1308, 1413, 1526, 1570, 1635, 1884, 1962, 2180, 2198, 2289, 2355, 2826, 3052, 3140, 3270, 3297, 3815, 3924, 4396, 4578, 4710, 4905, 5495, 5652, 6540, 6594, 6867, 7065, 7630, 9156, 9420, 9810, 9891, 10990, 11445, 13188, 13734, 14130, 15260, 16485, 17113, 19620, 19782, 21980, 22890, 27468, 28260, 32970, 34226, 34335, 39564, 45780, 49455, 51339, 65940, 68452, 68670, 85565, 98910, 102678, 119791, 137340, 154017, 171130, 197820, 205356, 239582, 256695, 308034, 342260, 359373, 479164, 513390, 598955, 616068, 718746, 770085, 1026780, 1078119, 1197910, 1437492, 1540170, 1796865, 2156238, 2395820, 3080340, 3593730, 4312476, 5390595, 7187460, 10781190, 21562380]

約数ペア:

[(1, 21562380), (2, 10781190), (3, 7187460), (4, 5390595), (5, 4312476), (6, 3593730), (7, 3080340), (9, 2395820), (10, 2156238), (12, 1796865), (14, 1540170), (15, 1437492), (18, 1197910), (20, 1078119), (21, 1026780), (28, 770085), (30, 718746), (35, 616068), (36, 598955), (42, 513390), (45, 479164), (60, 359373), (63, 342260), (70, 308034), (84, 256695), (90, 239582), (105, 205356), (109, 197820), (126, 171130), (140, 154017), (157, 137340), (180, 119791), (210, 102678), (218, 98910), (252, 85565), (314, 68670), (315, 68452), (327, 65940), (420, 51339), (436, 49455), (471, 45780), (545, 39564), (628, 34335), (630, 34226), (654, 32970), (763, 28260), (785, 27468), (942, 22890), (981, 21980), (1090, 19782), (1099, 19620), (1260, 17113), (1308, 16485), (1413, 15260), (1526, 14130), (1570, 13734), (1635, 13188), (1884, 11445), (1962, 10990), (2180, 9891), (2198, 9810), (2289, 9420), (2355, 9156), (2826, 7630), (3052, 7065), (3140, 6867), (3270, 6594), (3297, 6540), (3815, 5652), (3924, 5495), (4396, 4905), (4578, 4710)]