388542987

素因数分解:

$3^4\times 7^1\times {\mathrm{131}}^1\times {\mathrm{5231}}^1$

素因数の和:5381

約数の個数: 40

約数和(自身を含む): 668524032

約数和(自身を除く): 279981045

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 131, 189, 393, 567, 917, 1179, 2751, 3537, 5231, 8253, 10611, 15693, 24759, 36617, 47079, 74277, 109851, 141237, 329553, 423711, 685261, 988659, 2055783, 2965977, 4796827, 6167349, 14390481, 18502047, 43171443, 55506141, 129514329, 388542987]

約数ペア:

[(1, 388542987), (3, 129514329), (7, 55506141), (9, 43171443), (21, 18502047), (27, 14390481), (63, 6167349), (81, 4796827), (131, 2965977), (189, 2055783), (393, 988659), (567, 685261), (917, 423711), (1179, 329553), (2751, 141237), (3537, 109851), (5231, 74277), (8253, 47079), (10611, 36617), (15693, 24759)]