20883915

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{1231}}^1$

素因数の和:1284

約数の個数: 48

約数和(自身を含む): 40360320

約数和(自身を除く): 19476405

約数列:

[1, 3, 5, 9, 13, 15, 29, 39, 45, 65, 87, 117, 145, 195, 261, 377, 435, 585, 1131, 1231, 1305, 1885, 3393, 3693, 5655, 6155, 11079, 16003, 16965, 18465, 35699, 48009, 55395, 80015, 107097, 144027, 178495, 240045, 321291, 464087, 535485, 720135, 1392261, 1606455, 2320435, 4176783, 6961305, 20883915]

約数ペア:

[(1, 20883915), (3, 6961305), (5, 4176783), (9, 2320435), (13, 1606455), (15, 1392261), (29, 720135), (39, 535485), (45, 464087), (65, 321291), (87, 240045), (117, 178495), (145, 144027), (195, 107097), (261, 80015), (377, 55395), (435, 48009), (585, 35699), (1131, 18465), (1231, 16965), (1305, 16003), (1885, 11079), (3393, 6155), (3693, 5655)]