21578865

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{157}}^1$

素因数の和:207

約数の個数: 96

約数和(自身を含む): 46687104

約数和(自身を除く): 25108239

約数列:

[1, 3, 5, 7, 11, 15, 17, 21, 33, 35, 49, 51, 55, 77, 85, 105, 119, 147, 157, 165, 187, 231, 245, 255, 357, 385, 471, 539, 561, 595, 735, 785, 833, 935, 1099, 1155, 1309, 1617, 1727, 1785, 2355, 2499, 2669, 2695, 2805, 3297, 3927, 4165, 5181, 5495, 6545, 7693, 8007, 8085, 8635, 9163, 12089, 12495, 13345, 16485, 18683, 19635, 23079, 25905, 27489, 29359, 36267, 38465, 40035, 45815, 56049, 60445, 84623, 88077, 93415, 115395, 130781, 137445, 146795, 181335, 205513, 253869, 280245, 392343, 423115, 440385, 616539, 653905, 1027565, 1269345, 1438591, 1961715, 3082695, 4315773, 7192955, 21578865]

約数ペア:

[(1, 21578865), (3, 7192955), (5, 4315773), (7, 3082695), (11, 1961715), (15, 1438591), (17, 1269345), (21, 1027565), (33, 653905), (35, 616539), (49, 440385), (51, 423115), (55, 392343), (77, 280245), (85, 253869), (105, 205513), (119, 181335), (147, 146795), (157, 137445), (165, 130781), (187, 115395), (231, 93415), (245, 88077), (255, 84623), (357, 60445), (385, 56049), (471, 45815), (539, 40035), (561, 38465), (595, 36267), (735, 29359), (785, 27489), (833, 25905), (935, 23079), (1099, 19635), (1155, 18683), (1309, 16485), (1617, 13345), (1727, 12495), (1785, 12089), (2355, 9163), (2499, 8635), (2669, 8085), (2695, 8007), (2805, 7693), (3297, 6545), (3927, 5495), (4165, 5181)]