28377860

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{23}}^1\times {\mathrm{1259}}^1$

素因数の和:1305

約数の個数: 72

約数和(自身を含む): 72394560

約数和(自身を除く): 44016700

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 35, 46, 49, 70, 92, 98, 115, 140, 161, 196, 230, 245, 322, 460, 490, 644, 805, 980, 1127, 1259, 1610, 2254, 2518, 3220, 4508, 5036, 5635, 6295, 8813, 11270, 12590, 17626, 22540, 25180, 28957, 35252, 44065, 57914, 61691, 88130, 115828, 123382, 144785, 176260, 202699, 246764, 289570, 308455, 405398, 579140, 616910, 810796, 1013495, 1233820, 1418893, 2026990, 2837786, 4053980, 5675572, 7094465, 14188930, 28377860]

約数ペア:

[(1, 28377860), (2, 14188930), (4, 7094465), (5, 5675572), (7, 4053980), (10, 2837786), (14, 2026990), (20, 1418893), (23, 1233820), (28, 1013495), (35, 810796), (46, 616910), (49, 579140), (70, 405398), (92, 308455), (98, 289570), (115, 246764), (140, 202699), (161, 176260), (196, 144785), (230, 123382), (245, 115828), (322, 88130), (460, 61691), (490, 57914), (644, 44065), (805, 35252), (980, 28957), (1127, 25180), (1259, 22540), (1610, 17626), (2254, 12590), (2518, 11270), (3220, 8813), (4508, 6295), (5036, 5635)]