20345504

素因数分解:

$2^5\times {\mathrm{19}}^1\times {\mathrm{109}}^1\times {\mathrm{307}}^1$

素因数の和:445

約数の個数: 48

約数和(自身を含む): 42688800

約数和(自身を除く): 22343296

約数列:

[1, 2, 4, 8, 16, 19, 32, 38, 76, 109, 152, 218, 304, 307, 436, 608, 614, 872, 1228, 1744, 2071, 2456, 3488, 4142, 4912, 5833, 8284, 9824, 11666, 16568, 23332, 33136, 33463, 46664, 66272, 66926, 93328, 133852, 186656, 267704, 535408, 635797, 1070816, 1271594, 2543188, 5086376, 10172752, 20345504]

約数ペア:

[(1, 20345504), (2, 10172752), (4, 5086376), (8, 2543188), (16, 1271594), (19, 1070816), (32, 635797), (38, 535408), (76, 267704), (109, 186656), (152, 133852), (218, 93328), (304, 66926), (307, 66272), (436, 46664), (608, 33463), (614, 33136), (872, 23332), (1228, 16568), (1744, 11666), (2071, 9824), (2456, 8284), (3488, 5833), (4142, 4912)]