21444080

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{149}}^1\times {\mathrm{257}}^1$

素因数の和:426

約数の個数: 80

約数和(自身を含む): 57585600

約数和(自身を除く): 36141520

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 149, 257, 280, 298, 514, 560, 596, 745, 1028, 1043, 1192, 1285, 1490, 1799, 2056, 2086, 2384, 2570, 2980, 3598, 4112, 4172, 5140, 5215, 5960, 7196, 8344, 8995, 10280, 10430, 11920, 14392, 16688, 17990, 20560, 20860, 28784, 35980, 38293, 41720, 71960, 76586, 83440, 143920, 153172, 191465, 268051, 306344, 382930, 536102, 612688, 765860, 1072204, 1340255, 1531720, 2144408, 2680510, 3063440, 4288816, 5361020, 10722040, 21444080]

約数ペア:

[(1, 21444080), (2, 10722040), (4, 5361020), (5, 4288816), (7, 3063440), (8, 2680510), (10, 2144408), (14, 1531720), (16, 1340255), (20, 1072204), (28, 765860), (35, 612688), (40, 536102), (56, 382930), (70, 306344), (80, 268051), (112, 191465), (140, 153172), (149, 143920), (257, 83440), (280, 76586), (298, 71960), (514, 41720), (560, 38293), (596, 35980), (745, 28784), (1028, 20860), (1043, 20560), (1192, 17990), (1285, 16688), (1490, 14392), (1799, 11920), (2056, 10430), (2086, 10280), (2384, 8995), (2570, 8344), (2980, 7196), (3598, 5960), (4112, 5215), (4172, 5140)]