20020120

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{463}}^1$

素因数の和:544

約数の個数: 64

約数和(自身を含む): 48107520

約数和(自身を除く): 28087400

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 47, 92, 94, 115, 184, 188, 230, 235, 376, 460, 463, 470, 920, 926, 940, 1081, 1852, 1880, 2162, 2315, 3704, 4324, 4630, 5405, 8648, 9260, 10649, 10810, 18520, 21298, 21620, 21761, 42596, 43240, 43522, 53245, 85192, 87044, 106490, 108805, 174088, 212980, 217610, 425960, 435220, 500503, 870440, 1001006, 2002012, 2502515, 4004024, 5005030, 10010060, 20020120]

約数ペア:

[(1, 20020120), (2, 10010060), (4, 5005030), (5, 4004024), (8, 2502515), (10, 2002012), (20, 1001006), (23, 870440), (40, 500503), (46, 435220), (47, 425960), (92, 217610), (94, 212980), (115, 174088), (184, 108805), (188, 106490), (230, 87044), (235, 85192), (376, 53245), (460, 43522), (463, 43240), (470, 42596), (920, 21761), (926, 21620), (940, 21298), (1081, 18520), (1852, 10810), (1880, 10649), (2162, 9260), (2315, 8648), (3704, 5405), (4324, 4630)]