21785890

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{173}}^1\times {\mathrm{257}}^1$

素因数の和:451

約数の個数: 48

約数和(自身を含む): 46059192

約数和(自身を除く): 24273302

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 173, 245, 257, 346, 490, 514, 865, 1211, 1285, 1730, 1799, 2422, 2570, 3598, 6055, 8477, 8995, 12110, 12593, 16954, 17990, 25186, 42385, 44461, 62965, 84770, 88922, 125930, 222305, 311227, 444610, 622454, 1556135, 2178589, 3112270, 4357178, 10892945, 21785890]

約数ペア:

[(1, 21785890), (2, 10892945), (5, 4357178), (7, 3112270), (10, 2178589), (14, 1556135), (35, 622454), (49, 444610), (70, 311227), (98, 222305), (173, 125930), (245, 88922), (257, 84770), (346, 62965), (490, 44461), (514, 42385), (865, 25186), (1211, 17990), (1285, 16954), (1730, 12593), (1799, 12110), (2422, 8995), (2570, 8477), (3598, 6055)]