21303520

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{827}}^1$

素因数の和:872

約数の個数: 96

約数和(自身を含む): 60092928

約数和(自身を除く): 38789408

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 23, 28, 32, 35, 40, 46, 56, 70, 80, 92, 112, 115, 140, 160, 161, 184, 224, 230, 280, 322, 368, 460, 560, 644, 736, 805, 827, 920, 1120, 1288, 1610, 1654, 1840, 2576, 3220, 3308, 3680, 4135, 5152, 5789, 6440, 6616, 8270, 11578, 12880, 13232, 16540, 19021, 23156, 25760, 26464, 28945, 33080, 38042, 46312, 57890, 66160, 76084, 92624, 95105, 115780, 132320, 133147, 152168, 185248, 190210, 231560, 266294, 304336, 380420, 463120, 532588, 608672, 665735, 760840, 926240, 1065176, 1331470, 1521680, 2130352, 2662940, 3043360, 4260704, 5325880, 10651760, 21303520]

約数ペア:

[(1, 21303520), (2, 10651760), (4, 5325880), (5, 4260704), (7, 3043360), (8, 2662940), (10, 2130352), (14, 1521680), (16, 1331470), (20, 1065176), (23, 926240), (28, 760840), (32, 665735), (35, 608672), (40, 532588), (46, 463120), (56, 380420), (70, 304336), (80, 266294), (92, 231560), (112, 190210), (115, 185248), (140, 152168), (160, 133147), (161, 132320), (184, 115780), (224, 95105), (230, 92624), (280, 76084), (322, 66160), (368, 57890), (460, 46312), (560, 38042), (644, 33080), (736, 28945), (805, 26464), (827, 25760), (920, 23156), (1120, 19021), (1288, 16540), (1610, 13232), (1654, 12880), (1840, 11578), (2576, 8270), (3220, 6616), (3308, 6440), (3680, 5789), (4135, 5152)]