778860388

素因数分解:

$2^2\times {\mathrm{19}}^2\times {\mathrm{541}}^1\times {\mathrm{997}}^1$

素因数の和:1580

約数の個数: 36

約数和(自身を含む): 1442622972

約数和(自身を除く): 663762584

約数列:

[1, 2, 4, 19, 38, 76, 361, 541, 722, 997, 1082, 1444, 1994, 2164, 3988, 10279, 18943, 20558, 37886, 41116, 75772, 195301, 359917, 390602, 539377, 719834, 781204, 1078754, 1439668, 2157508, 10248163, 20496326, 40992652, 194715097, 389430194, 778860388]

約数ペア:

[(1, 778860388), (2, 389430194), (4, 194715097), (19, 40992652), (38, 20496326), (76, 10248163), (361, 2157508), (541, 1439668), (722, 1078754), (997, 781204), (1082, 719834), (1444, 539377), (1994, 390602), (2164, 359917), (3988, 195301), (10279, 75772), (18943, 41116), (20558, 37886)]