221720980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{547}}^1\times {\mathrm{1559}}^1$

素因数の和:2128

約数の個数: 48

約数和(自身を含む): 502669440

約数和(自身を除く): 280948460

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 547, 1094, 1559, 2188, 2735, 3118, 5470, 6236, 7111, 7795, 10940, 14222, 15590, 20267, 28444, 31180, 35555, 40534, 71110, 81068, 101335, 142220, 202670, 405340, 852773, 1705546, 3411092, 4263865, 8527730, 11086049, 17055460, 22172098, 44344196, 55430245, 110860490, 221720980]

約数ペア:

[(1, 221720980), (2, 110860490), (4, 55430245), (5, 44344196), (10, 22172098), (13, 17055460), (20, 11086049), (26, 8527730), (52, 4263865), (65, 3411092), (130, 1705546), (260, 852773), (547, 405340), (1094, 202670), (1559, 142220), (2188, 101335), (2735, 81068), (3118, 71110), (5470, 40534), (6236, 35555), (7111, 31180), (7795, 28444), (10940, 20267), (14222, 15590)]