21048440

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{10739}}^1$

素因数の和:10764

約数の個数: 48

約数和(自身を含む): 55096200

約数和(自身を除く): 34047760

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 392, 490, 980, 1960, 10739, 21478, 42956, 53695, 75173, 85912, 107390, 150346, 214780, 300692, 375865, 429560, 526211, 601384, 751730, 1052422, 1503460, 2104844, 2631055, 3006920, 4209688, 5262110, 10524220, 21048440]

約数ペア:

[(1, 21048440), (2, 10524220), (4, 5262110), (5, 4209688), (7, 3006920), (8, 2631055), (10, 2104844), (14, 1503460), (20, 1052422), (28, 751730), (35, 601384), (40, 526211), (49, 429560), (56, 375865), (70, 300692), (98, 214780), (140, 150346), (196, 107390), (245, 85912), (280, 75173), (392, 53695), (490, 42956), (980, 21478), (1960, 10739)]