21278916

素因数分解:

$2^2\times 3^3\times {\mathrm{73}}^1\times {\mathrm{2699}}^1$

素因数の和:2785

約数の個数: 48

約数和(自身を含む): 55944000

約数和(自身を除く): 34665084

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, 73, 108, 146, 219, 292, 438, 657, 876, 1314, 1971, 2628, 2699, 3942, 5398, 7884, 8097, 10796, 16194, 24291, 32388, 48582, 72873, 97164, 145746, 197027, 291492, 394054, 591081, 788108, 1182162, 1773243, 2364324, 3546486, 5319729, 7092972, 10639458, 21278916]

約数ペア:

[(1, 21278916), (2, 10639458), (3, 7092972), (4, 5319729), (6, 3546486), (9, 2364324), (12, 1773243), (18, 1182162), (27, 788108), (36, 591081), (54, 394054), (73, 291492), (108, 197027), (146, 145746), (219, 97164), (292, 72873), (438, 48582), (657, 32388), (876, 24291), (1314, 16194), (1971, 10796), (2628, 8097), (2699, 7884), (3942, 5398)]