20643525

素因数分解:

$3^3\times 5^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{257}}^1$

素因数の和:300

約数の個数: 96

約数和(自身を含む): 46068480

約数和(自身を除く): 25424955

約数列:

[1, 3, 5, 7, 9, 15, 17, 21, 25, 27, 35, 45, 51, 63, 75, 85, 105, 119, 135, 153, 175, 189, 225, 255, 257, 315, 357, 425, 459, 525, 595, 675, 765, 771, 945, 1071, 1275, 1285, 1575, 1785, 1799, 2295, 2313, 2975, 3213, 3825, 3855, 4369, 4725, 5355, 5397, 6425, 6939, 8925, 8995, 11475, 11565, 13107, 16065, 16191, 19275, 21845, 26775, 26985, 30583, 34695, 39321, 44975, 48573, 57825, 65535, 80325, 80955, 91749, 109225, 117963, 134925, 152915, 173475, 196605, 242865, 275247, 327675, 404775, 458745, 589815, 764575, 825741, 983025, 1214325, 1376235, 2293725, 2949075, 4128705, 6881175, 20643525]

約数ペア:

[(1, 20643525), (3, 6881175), (5, 4128705), (7, 2949075), (9, 2293725), (15, 1376235), (17, 1214325), (21, 983025), (25, 825741), (27, 764575), (35, 589815), (45, 458745), (51, 404775), (63, 327675), (75, 275247), (85, 242865), (105, 196605), (119, 173475), (135, 152915), (153, 134925), (175, 117963), (189, 109225), (225, 91749), (255, 80955), (257, 80325), (315, 65535), (357, 57825), (425, 48573), (459, 44975), (525, 39321), (595, 34695), (675, 30583), (765, 26985), (771, 26775), (945, 21845), (1071, 19275), (1275, 16191), (1285, 16065), (1575, 13107), (1785, 11565), (1799, 11475), (2295, 8995), (2313, 8925), (2975, 6939), (3213, 6425), (3825, 5397), (3855, 5355), (4369, 4725)]