21570228

素因数分解:

$2^2\times 3^2\times {\mathrm{23}}^1\times {\mathrm{109}}^1\times {\mathrm{239}}^1$

素因数の和:381

約数の個数: 72

約数和(自身を含む): 57657600

約数和(自身を除く): 36087372

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 23, 36, 46, 69, 92, 109, 138, 207, 218, 239, 276, 327, 414, 436, 478, 654, 717, 828, 956, 981, 1308, 1434, 1962, 2151, 2507, 2868, 3924, 4302, 5014, 5497, 7521, 8604, 10028, 10994, 15042, 16491, 21988, 22563, 26051, 30084, 32982, 45126, 49473, 52102, 65964, 78153, 90252, 98946, 104204, 156306, 197892, 234459, 312612, 468918, 599173, 937836, 1198346, 1797519, 2396692, 3595038, 5392557, 7190076, 10785114, 21570228]

約数ペア:

[(1, 21570228), (2, 10785114), (3, 7190076), (4, 5392557), (6, 3595038), (9, 2396692), (12, 1797519), (18, 1198346), (23, 937836), (36, 599173), (46, 468918), (69, 312612), (92, 234459), (109, 197892), (138, 156306), (207, 104204), (218, 98946), (239, 90252), (276, 78153), (327, 65964), (414, 52102), (436, 49473), (478, 45126), (654, 32982), (717, 30084), (828, 26051), (956, 22563), (981, 21988), (1308, 16491), (1434, 15042), (1962, 10994), (2151, 10028), (2507, 8604), (2868, 7521), (3924, 5497), (4302, 5014)]