18905425

素因数分解:

$5^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1$

素因数の和:119

約数の個数: 72

約数和(自身を含む): 31551552

約数和(自身を除く): 12646127

約数列:

[1, 5, 7, 11, 23, 25, 35, 49, 55, 61, 77, 115, 161, 175, 245, 253, 275, 305, 385, 427, 539, 575, 671, 805, 1127, 1225, 1265, 1403, 1525, 1771, 1925, 2135, 2695, 2989, 3355, 4025, 4697, 5635, 6325, 7015, 8855, 9821, 10675, 12397, 13475, 14945, 15433, 16775, 23485, 28175, 32879, 35075, 44275, 49105, 61985, 68747, 74725, 77165, 108031, 117425, 164395, 245525, 309925, 343735, 385825, 540155, 756217, 821975, 1718675, 2700775, 3781085, 18905425]

約数ペア:

[(1, 18905425), (5, 3781085), (7, 2700775), (11, 1718675), (23, 821975), (25, 756217), (35, 540155), (49, 385825), (55, 343735), (61, 309925), (77, 245525), (115, 164395), (161, 117425), (175, 108031), (245, 77165), (253, 74725), (275, 68747), (305, 61985), (385, 49105), (427, 44275), (539, 35075), (575, 32879), (671, 28175), (805, 23485), (1127, 16775), (1225, 15433), (1265, 14945), (1403, 13475), (1525, 12397), (1771, 10675), (1925, 9821), (2135, 8855), (2695, 7015), (2989, 6325), (3355, 5635), (4025, 4697)]