19983704

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{127}}^1$

素因数の和:252

約数の個数: 64

約数和(自身を含む): 43545600

約数和(自身を除く): 23561896

約数列:

[1, 2, 4, 8, 13, 17, 26, 34, 52, 68, 89, 104, 127, 136, 178, 221, 254, 356, 442, 508, 712, 884, 1016, 1157, 1513, 1651, 1768, 2159, 2314, 3026, 3302, 4318, 4628, 6052, 6604, 8636, 9256, 11303, 12104, 13208, 17272, 19669, 22606, 28067, 39338, 45212, 56134, 78676, 90424, 112268, 146939, 157352, 192151, 224536, 293878, 384302, 587756, 768604, 1175512, 1537208, 2497963, 4995926, 9991852, 19983704]

約数ペア:

[(1, 19983704), (2, 9991852), (4, 4995926), (8, 2497963), (13, 1537208), (17, 1175512), (26, 768604), (34, 587756), (52, 384302), (68, 293878), (89, 224536), (104, 192151), (127, 157352), (136, 146939), (178, 112268), (221, 90424), (254, 78676), (356, 56134), (442, 45212), (508, 39338), (712, 28067), (884, 22606), (1016, 19669), (1157, 17272), (1513, 13208), (1651, 12104), (1768, 11303), (2159, 9256), (2314, 8636), (3026, 6604), (3302, 6052), (4318, 4628)]