221959225

素因数分解:

$5^2\times {\mathrm{17}}^2\times {\mathrm{31}}^1\times {\mathrm{991}}^1$

素因数の和:1066

約数の個数: 36

約数和(自身を含む): 302107648

約数和(自身を除く): 80148423

約数列:

[1, 5, 17, 25, 31, 85, 155, 289, 425, 527, 775, 991, 1445, 2635, 4955, 7225, 8959, 13175, 16847, 24775, 30721, 44795, 84235, 153605, 223975, 286399, 421175, 522257, 768025, 1431995, 2611285, 7159975, 8878369, 13056425, 44391845, 221959225]

約数ペア:

[(1, 221959225), (5, 44391845), (17, 13056425), (25, 8878369), (31, 7159975), (85, 2611285), (155, 1431995), (289, 768025), (425, 522257), (527, 421175), (775, 286399), (991, 223975), (1445, 153605), (2635, 84235), (4955, 44795), (7225, 30721), (8959, 24775), (13175, 16847)]