20655765

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{67}}^1$

素因数の和:139

約数の個数: 96

約数和(自身を含む): 42771456

約数和(自身を除く): 22115691

約数列:

[1, 3, 5, 9, 13, 15, 17, 31, 39, 45, 51, 65, 67, 85, 93, 117, 153, 155, 195, 201, 221, 255, 279, 335, 403, 465, 527, 585, 603, 663, 765, 871, 1005, 1105, 1139, 1209, 1395, 1581, 1989, 2015, 2077, 2613, 2635, 3015, 3315, 3417, 3627, 4355, 4743, 5695, 6045, 6231, 6851, 7839, 7905, 9945, 10251, 10385, 13065, 14807, 17085, 18135, 18693, 20553, 23715, 27001, 31155, 34255, 35309, 39195, 44421, 51255, 61659, 74035, 81003, 93465, 102765, 105927, 133263, 135005, 176545, 222105, 243009, 308295, 317781, 405015, 459017, 529635, 666315, 1215045, 1377051, 1588905, 2295085, 4131153, 6885255, 20655765]

約数ペア:

[(1, 20655765), (3, 6885255), (5, 4131153), (9, 2295085), (13, 1588905), (15, 1377051), (17, 1215045), (31, 666315), (39, 529635), (45, 459017), (51, 405015), (65, 317781), (67, 308295), (85, 243009), (93, 222105), (117, 176545), (153, 135005), (155, 133263), (195, 105927), (201, 102765), (221, 93465), (255, 81003), (279, 74035), (335, 61659), (403, 51255), (465, 44421), (527, 39195), (585, 35309), (603, 34255), (663, 31155), (765, 27001), (871, 23715), (1005, 20553), (1105, 18693), (1139, 18135), (1209, 17085), (1395, 14807), (1581, 13065), (1989, 10385), (2015, 10251), (2077, 9945), (2613, 7905), (2635, 7839), (3015, 6851), (3315, 6231), (3417, 6045), (3627, 5695), (4355, 4743)]