778019780

素因数分解:

$2^2\times 5^1\times {\mathrm{127}}^1\times {\mathrm{157}}^1\times {\mathrm{1951}}^1$

素因数の和:2244

約数の個数: 48

約数和(自身を含む): 1658044416

約数和(自身を除く): 880024636

約数列:

[1, 2, 4, 5, 10, 20, 127, 157, 254, 314, 508, 628, 635, 785, 1270, 1570, 1951, 2540, 3140, 3902, 7804, 9755, 19510, 19939, 39020, 39878, 79756, 99695, 199390, 247777, 306307, 398780, 495554, 612614, 991108, 1225228, 1238885, 1531535, 2477770, 3063070, 4955540, 6126140, 38900989, 77801978, 155603956, 194504945, 389009890, 778019780]

約数ペア:

[(1, 778019780), (2, 389009890), (4, 194504945), (5, 155603956), (10, 77801978), (20, 38900989), (127, 6126140), (157, 4955540), (254, 3063070), (314, 2477770), (508, 1531535), (628, 1238885), (635, 1225228), (785, 991108), (1270, 612614), (1570, 495554), (1951, 398780), (2540, 306307), (3140, 247777), (3902, 199390), (7804, 99695), (9755, 79756), (19510, 39878), (19939, 39020)]