21328416

素因数分解:

$2^5\times 3^2\times {\mathrm{103}}^1\times {\mathrm{719}}^1$

素因数の和:838

約数の個数: 72

約数和(自身を含む): 61326720

約数和(自身を除く): 39998304

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 32, 36, 48, 72, 96, 103, 144, 206, 288, 309, 412, 618, 719, 824, 927, 1236, 1438, 1648, 1854, 2157, 2472, 2876, 3296, 3708, 4314, 4944, 5752, 6471, 7416, 8628, 9888, 11504, 12942, 14832, 17256, 23008, 25884, 29664, 34512, 51768, 69024, 74057, 103536, 148114, 207072, 222171, 296228, 444342, 592456, 666513, 888684, 1184912, 1333026, 1777368, 2369824, 2666052, 3554736, 5332104, 7109472, 10664208, 21328416]

約数ペア:

[(1, 21328416), (2, 10664208), (3, 7109472), (4, 5332104), (6, 3554736), (8, 2666052), (9, 2369824), (12, 1777368), (16, 1333026), (18, 1184912), (24, 888684), (32, 666513), (36, 592456), (48, 444342), (72, 296228), (96, 222171), (103, 207072), (144, 148114), (206, 103536), (288, 74057), (309, 69024), (412, 51768), (618, 34512), (719, 29664), (824, 25884), (927, 23008), (1236, 17256), (1438, 14832), (1648, 12942), (1854, 11504), (2157, 9888), (2472, 8628), (2876, 7416), (3296, 6471), (3708, 5752), (4314, 4944)]