1721780

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{197}}^1$

素因数の和:248

約数の個数: 48

約数和(自身を含む): 3991680

約数和(自身を除く): 2269900

約数列:

[1, 2, 4, 5, 10, 19, 20, 23, 38, 46, 76, 92, 95, 115, 190, 197, 230, 380, 394, 437, 460, 788, 874, 985, 1748, 1970, 2185, 3743, 3940, 4370, 4531, 7486, 8740, 9062, 14972, 18124, 18715, 22655, 37430, 45310, 74860, 86089, 90620, 172178, 344356, 430445, 860890, 1721780]

約数ペア:

[(1, 1721780), (2, 860890), (4, 430445), (5, 344356), (10, 172178), (19, 90620), (20, 86089), (23, 74860), (38, 45310), (46, 37430), (76, 22655), (92, 18715), (95, 18124), (115, 14972), (190, 9062), (197, 8740), (230, 7486), (380, 4531), (394, 4370), (437, 3940), (460, 3743), (788, 2185), (874, 1970), (985, 1748)]