20185580

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{137}}^1\times {\mathrm{139}}^1$

素因数の和:338

約数の個数: 48

約数和(自身を含む): 43817760

約数和(自身を除く): 23632180

約数列:

[1, 2, 4, 5, 10, 20, 53, 106, 137, 139, 212, 265, 274, 278, 530, 548, 556, 685, 695, 1060, 1370, 1390, 2740, 2780, 7261, 7367, 14522, 14734, 19043, 29044, 29468, 36305, 36835, 38086, 72610, 73670, 76172, 95215, 145220, 147340, 190430, 380860, 1009279, 2018558, 4037116, 5046395, 10092790, 20185580]

約数ペア:

[(1, 20185580), (2, 10092790), (4, 5046395), (5, 4037116), (10, 2018558), (20, 1009279), (53, 380860), (106, 190430), (137, 147340), (139, 145220), (212, 95215), (265, 76172), (274, 73670), (278, 72610), (530, 38086), (548, 36835), (556, 36305), (685, 29468), (695, 29044), (1060, 19043), (1370, 14734), (1390, 14522), (2740, 7367), (2780, 7261)]