20861392

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{163}}^1\times {\mathrm{421}}^1$

素因数の和:611

約数の個数: 40

約数和(自身を含む): 42908960

約数和(自身を除く): 22047568

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 163, 304, 326, 421, 652, 842, 1304, 1684, 2608, 3097, 3368, 6194, 6736, 7999, 12388, 15998, 24776, 31996, 49552, 63992, 68623, 127984, 137246, 274492, 548984, 1097968, 1303837, 2607674, 5215348, 10430696, 20861392]

約数ペア:

[(1, 20861392), (2, 10430696), (4, 5215348), (8, 2607674), (16, 1303837), (19, 1097968), (38, 548984), (76, 274492), (152, 137246), (163, 127984), (304, 68623), (326, 63992), (421, 49552), (652, 31996), (842, 24776), (1304, 15998), (1684, 12388), (2608, 7999), (3097, 6736), (3368, 6194)]