21502340

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{131}}^1\times {\mathrm{283}}^1$

素因数の和:452

約数の個数: 48

約数和(自身を含む): 47234880

約数和(自身を除く): 25732540

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 116, 131, 145, 262, 283, 290, 524, 566, 580, 655, 1132, 1310, 1415, 2620, 2830, 3799, 5660, 7598, 8207, 15196, 16414, 18995, 32828, 37073, 37990, 41035, 74146, 75980, 82070, 148292, 164140, 185365, 370730, 741460, 1075117, 2150234, 4300468, 5375585, 10751170, 21502340]

約数ペア:

[(1, 21502340), (2, 10751170), (4, 5375585), (5, 4300468), (10, 2150234), (20, 1075117), (29, 741460), (58, 370730), (116, 185365), (131, 164140), (145, 148292), (262, 82070), (283, 75980), (290, 74146), (524, 41035), (566, 37990), (580, 37073), (655, 32828), (1132, 18995), (1310, 16414), (1415, 15196), (2620, 8207), (2830, 7598), (3799, 5660)]