19900448

素因数分解:

$2^5\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{461}}^1$

素因数の和:561

約数の個数: 48

約数和(自身を含む): 41912640

約数和(自身を除く): 22012192

約数列:

[1, 2, 4, 8, 16, 19, 32, 38, 71, 76, 142, 152, 284, 304, 461, 568, 608, 922, 1136, 1349, 1844, 2272, 2698, 3688, 5396, 7376, 8759, 10792, 14752, 17518, 21584, 32731, 35036, 43168, 65462, 70072, 130924, 140144, 261848, 280288, 523696, 621889, 1047392, 1243778, 2487556, 4975112, 9950224, 19900448]

約数ペア:

[(1, 19900448), (2, 9950224), (4, 4975112), (8, 2487556), (16, 1243778), (19, 1047392), (32, 621889), (38, 523696), (71, 280288), (76, 261848), (142, 140144), (152, 130924), (284, 70072), (304, 65462), (461, 43168), (568, 35036), (608, 32731), (922, 21584), (1136, 17518), (1349, 14752), (1844, 10792), (2272, 8759), (2698, 7376), (3688, 5396)]