20756645

素因数分解:

$5^1\times 7^5\times {\mathrm{13}}^1\times {\mathrm{19}}^1$

素因数の和:72

約数の個数: 48

約数和(自身を含む): 32941440

約数和(自身を除く): 12184795

約数列:

[1, 5, 7, 13, 19, 35, 49, 65, 91, 95, 133, 245, 247, 343, 455, 637, 665, 931, 1235, 1715, 1729, 2401, 3185, 4459, 4655, 6517, 8645, 12005, 12103, 16807, 22295, 31213, 32585, 45619, 60515, 84035, 84721, 156065, 218491, 228095, 319333, 423605, 593047, 1092455, 1596665, 2965235, 4151329, 20756645]

約数ペア:

[(1, 20756645), (5, 4151329), (7, 2965235), (13, 1596665), (19, 1092455), (35, 593047), (49, 423605), (65, 319333), (91, 228095), (95, 218491), (133, 156065), (245, 84721), (247, 84035), (343, 60515), (455, 45619), (637, 32585), (665, 31213), (931, 22295), (1235, 16807), (1715, 12103), (1729, 12005), (2401, 8645), (3185, 6517), (4459, 4655)]