21311920

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{2003}}^1$

素因数の和:2042

約数の個数: 80

約数和(自身を含む): 59639040

約数和(自身を除く): 38327120

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 19, 20, 28, 35, 38, 40, 56, 70, 76, 80, 95, 112, 133, 140, 152, 190, 266, 280, 304, 380, 532, 560, 665, 760, 1064, 1330, 1520, 2003, 2128, 2660, 4006, 5320, 8012, 10015, 10640, 14021, 16024, 20030, 28042, 32048, 38057, 40060, 56084, 70105, 76114, 80120, 112168, 140210, 152228, 160240, 190285, 224336, 266399, 280420, 304456, 380570, 532798, 560840, 608912, 761140, 1065596, 1121680, 1331995, 1522280, 2131192, 2663990, 3044560, 4262384, 5327980, 10655960, 21311920]

約数ペア:

[(1, 21311920), (2, 10655960), (4, 5327980), (5, 4262384), (7, 3044560), (8, 2663990), (10, 2131192), (14, 1522280), (16, 1331995), (19, 1121680), (20, 1065596), (28, 761140), (35, 608912), (38, 560840), (40, 532798), (56, 380570), (70, 304456), (76, 280420), (80, 266399), (95, 224336), (112, 190285), (133, 160240), (140, 152228), (152, 140210), (190, 112168), (266, 80120), (280, 76114), (304, 70105), (380, 56084), (532, 40060), (560, 38057), (665, 32048), (760, 28042), (1064, 20030), (1330, 16024), (1520, 14021), (2003, 10640), (2128, 10015), (2660, 8012), (4006, 5320)]