21444220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{3259}}^1$

素因数の和:3322

約数の個数: 48

約数和(自身を含む): 52577280

約数和(自身を除く): 31133060

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 47, 70, 94, 140, 188, 235, 329, 470, 658, 940, 1316, 1645, 3259, 3290, 6518, 6580, 13036, 16295, 22813, 32590, 45626, 65180, 91252, 114065, 153173, 228130, 306346, 456260, 612692, 765865, 1072211, 1531730, 2144422, 3063460, 4288844, 5361055, 10722110, 21444220]

約数ペア:

[(1, 21444220), (2, 10722110), (4, 5361055), (5, 4288844), (7, 3063460), (10, 2144422), (14, 1531730), (20, 1072211), (28, 765865), (35, 612692), (47, 456260), (70, 306346), (94, 228130), (140, 153173), (188, 114065), (235, 91252), (329, 65180), (470, 45626), (658, 32590), (940, 22813), (1316, 16295), (1645, 13036), (3259, 6580), (3290, 6518)]