21990304

素因数分解:

$2^5\times 7^1\times {\mathrm{127}}^1\times {\mathrm{773}}^1$

素因数の和:917

約数の個数: 48

約数和(自身を含む): 49932288

約数和(自身を除く): 27941984

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 56, 112, 127, 224, 254, 508, 773, 889, 1016, 1546, 1778, 2032, 3092, 3556, 4064, 5411, 6184, 7112, 10822, 12368, 14224, 21644, 24736, 28448, 43288, 86576, 98171, 173152, 196342, 392684, 687197, 785368, 1374394, 1570736, 2748788, 3141472, 5497576, 10995152, 21990304]

約数ペア:

[(1, 21990304), (2, 10995152), (4, 5497576), (7, 3141472), (8, 2748788), (14, 1570736), (16, 1374394), (28, 785368), (32, 687197), (56, 392684), (112, 196342), (127, 173152), (224, 98171), (254, 86576), (508, 43288), (773, 28448), (889, 24736), (1016, 21644), (1546, 14224), (1778, 12368), (2032, 10822), (3092, 7112), (3556, 6184), (4064, 5411)]