16721920

素因数分解:

$2^{11}\times 5^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1$

素因数の和:121

約数の個数: 96

約数和(自身を含む): 42456960

約数和(自身を除く): 25735040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 32, 40, 46, 64, 71, 80, 92, 115, 128, 142, 160, 184, 230, 256, 284, 320, 355, 368, 460, 512, 568, 640, 710, 736, 920, 1024, 1136, 1280, 1420, 1472, 1633, 1840, 2048, 2272, 2560, 2840, 2944, 3266, 3680, 4544, 5120, 5680, 5888, 6532, 7360, 8165, 9088, 10240, 11360, 11776, 13064, 14720, 16330, 18176, 22720, 23552, 26128, 29440, 32660, 36352, 45440, 47104, 52256, 58880, 65320, 72704, 90880, 104512, 117760, 130640, 145408, 181760, 209024, 235520, 261280, 363520, 418048, 522560, 727040, 836096, 1045120, 1672192, 2090240, 3344384, 4180480, 8360960, 16721920]

約数ペア:

[(1, 16721920), (2, 8360960), (4, 4180480), (5, 3344384), (8, 2090240), (10, 1672192), (16, 1045120), (20, 836096), (23, 727040), (32, 522560), (40, 418048), (46, 363520), (64, 261280), (71, 235520), (80, 209024), (92, 181760), (115, 145408), (128, 130640), (142, 117760), (160, 104512), (184, 90880), (230, 72704), (256, 65320), (284, 58880), (320, 52256), (355, 47104), (368, 45440), (460, 36352), (512, 32660), (568, 29440), (640, 26128), (710, 23552), (736, 22720), (920, 18176), (1024, 16330), (1136, 14720), (1280, 13064), (1420, 11776), (1472, 11360), (1633, 10240), (1840, 9088), (2048, 8165), (2272, 7360), (2560, 6532), (2840, 5888), (2944, 5680), (3266, 5120), (3680, 4544)]