19905164

素因数分解:

$2^2\times {\mathrm{17}}^2\times {\mathrm{67}}^1\times {\mathrm{257}}^1$

素因数の和:362

約数の個数: 36

約数和(自身を含む): 37702056

約数和(自身を除く): 17796892

約数列:

[1, 2, 4, 17, 34, 67, 68, 134, 257, 268, 289, 514, 578, 1028, 1139, 1156, 2278, 4369, 4556, 8738, 17219, 17476, 19363, 34438, 38726, 68876, 74273, 77452, 148546, 292723, 297092, 585446, 1170892, 4976291, 9952582, 19905164]

約数ペア:

[(1, 19905164), (2, 9952582), (4, 4976291), (17, 1170892), (34, 585446), (67, 297092), (68, 292723), (134, 148546), (257, 77452), (268, 74273), (289, 68876), (514, 38726), (578, 34438), (1028, 19363), (1139, 17476), (1156, 17219), (2278, 8738), (4369, 4556)]