21649360

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{14243}}^1$

素因数の和:14275

約数の個数: 40

約数和(自身を含む): 52987680

約数和(自身を除く): 31338320

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 14243, 28486, 56972, 71215, 113944, 142430, 227888, 270617, 284860, 541234, 569720, 1082468, 1139440, 1353085, 2164936, 2706170, 4329872, 5412340, 10824680, 21649360]

約数ペア:

[(1, 21649360), (2, 10824680), (4, 5412340), (5, 4329872), (8, 2706170), (10, 2164936), (16, 1353085), (19, 1139440), (20, 1082468), (38, 569720), (40, 541234), (76, 284860), (80, 270617), (95, 227888), (152, 142430), (190, 113944), (304, 71215), (380, 56972), (760, 28486), (1520, 14243)]