19981520

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19213}}^1$

素因数の和:19239

約数の個数: 40

約数和(自身を含む): 50033256

約数和(自身を除く): 30051736

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 19213, 38426, 76852, 96065, 153704, 192130, 249769, 307408, 384260, 499538, 768520, 999076, 1248845, 1537040, 1998152, 2497690, 3996304, 4995380, 9990760, 19981520]

約数ペア:

[(1, 19981520), (2, 9990760), (4, 4995380), (5, 3996304), (8, 2497690), (10, 1998152), (13, 1537040), (16, 1248845), (20, 999076), (26, 768520), (40, 499538), (52, 384260), (65, 307408), (80, 249769), (104, 192130), (130, 153704), (208, 96065), (260, 76852), (520, 38426), (1040, 19213)]