21119420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{2473}}^1$

素因数の和:2550

約数の個数: 48

約数和(自身を含む): 51538368

約数和(自身を除く): 30418948

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 61, 70, 122, 140, 244, 305, 427, 610, 854, 1220, 1708, 2135, 2473, 4270, 4946, 8540, 9892, 12365, 17311, 24730, 34622, 49460, 69244, 86555, 150853, 173110, 301706, 346220, 603412, 754265, 1055971, 1508530, 2111942, 3017060, 4223884, 5279855, 10559710, 21119420]

約数ペア:

[(1, 21119420), (2, 10559710), (4, 5279855), (5, 4223884), (7, 3017060), (10, 2111942), (14, 1508530), (20, 1055971), (28, 754265), (35, 603412), (61, 346220), (70, 301706), (122, 173110), (140, 150853), (244, 86555), (305, 69244), (427, 49460), (610, 34622), (854, 24730), (1220, 17311), (1708, 12365), (2135, 9892), (2473, 8540), (4270, 4946)]