21750405

素因数分解:

$3^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{109}}^1\times {\mathrm{251}}^1$

素因数の和:421

約数の個数: 32

約数和(自身を含む): 35925120

約数和(自身を除く): 14174715

約数列:

[1, 3, 5, 15, 53, 109, 159, 251, 265, 327, 545, 753, 795, 1255, 1635, 3765, 5777, 13303, 17331, 27359, 28885, 39909, 66515, 82077, 86655, 136795, 199545, 410385, 1450027, 4350081, 7250135, 21750405]

約数ペア:

[(1, 21750405), (3, 7250135), (5, 4350081), (15, 1450027), (53, 410385), (109, 199545), (159, 136795), (251, 86655), (265, 82077), (327, 66515), (545, 39909), (753, 28885), (795, 27359), (1255, 17331), (1635, 13303), (3765, 5777)]