16380455

素因数分解:

$5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{139}}^1$

素因数の和:208

約数の個数: 48

約数和(自身を含む): 25472160

約数和(自身を除く): 9091705

約数列:

[1, 5, 7, 13, 35, 37, 49, 65, 91, 139, 185, 245, 259, 455, 481, 637, 695, 973, 1295, 1807, 1813, 2405, 3185, 3367, 4865, 5143, 6811, 9035, 9065, 12649, 16835, 23569, 25715, 34055, 36001, 63245, 66859, 88543, 117845, 180005, 252007, 334295, 442715, 468013, 1260035, 2340065, 3276091, 16380455]

約数ペア:

[(1, 16380455), (5, 3276091), (7, 2340065), (13, 1260035), (35, 468013), (37, 442715), (49, 334295), (65, 252007), (91, 180005), (139, 117845), (185, 88543), (245, 66859), (259, 63245), (455, 36001), (481, 34055), (637, 25715), (695, 23569), (973, 16835), (1295, 12649), (1807, 9065), (1813, 9035), (2405, 6811), (3185, 5143), (3367, 4865)]