128840691

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{137}}^1\times {\mathrm{2357}}^1$

素因数の和:2523

約数の個数: 32

約数和(自身を含む): 208258560

約数和(自身を除く): 79417869

約数列:

[1, 3, 7, 19, 21, 57, 133, 137, 399, 411, 959, 2357, 2603, 2877, 7071, 7809, 16499, 18221, 44783, 49497, 54663, 134349, 313481, 322909, 940443, 968727, 2260363, 6135271, 6781089, 18405813, 42946897, 128840691]

約数ペア:

[(1, 128840691), (3, 42946897), (7, 18405813), (19, 6781089), (21, 6135271), (57, 2260363), (133, 968727), (137, 940443), (399, 322909), (411, 313481), (959, 134349), (2357, 54663), (2603, 49497), (2877, 44783), (7071, 18221), (7809, 16499)]