81940120

素因数分解:

$2^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{38651}}^1$

素因数の和:38715

約数の個数: 32

約数和(自身を含む): 187848720

約数和(自身を除く): 105908600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 53, 106, 212, 265, 424, 530, 1060, 2120, 38651, 77302, 154604, 193255, 309208, 386510, 773020, 1546040, 2048503, 4097006, 8194012, 10242515, 16388024, 20485030, 40970060, 81940120]

約数ペア:

[(1, 81940120), (2, 40970060), (4, 20485030), (5, 16388024), (8, 10242515), (10, 8194012), (20, 4097006), (40, 2048503), (53, 1546040), (106, 773020), (212, 386510), (265, 309208), (424, 193255), (530, 154604), (1060, 77302), (2120, 38651)]